ORCID Profile
0000-0002-2016-9650
Current Organisation
University of Queensland
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Civil Engineering | Turbulent Flows | Water Resources Engineering | Environmental Engineering Modelling | Water And Sanitary Engineering | Surface Processes | Navigation and Position Fixing | Archaeology | Environmental Science and Management | Turbulent Flows | Environmental Engineering | Environmental Engineering Modelling | Aboriginal and Torres Strait Islander Archaeology | Environmental Management And Rehabilitation | Surfacewater Hydrology | Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.) | Aboriginal and Torres Strait Islander Environmental Knowledge | Environmental Management | Conservation and Biodiversity | Maritime Archaeology | Interdisciplinary Engineering | Environmental Rehabilitation (excl. Bioremediation) |
ANZSRC Socio-Economic Objective (SEO)
Land and Water Management of environments not elsewhere classified | Urban and Industrial Water Management | Land and water management | Expanding Knowledge in Engineering | Coastal and Estuarine Water Management | Coastal and Marine Management Policy | Civil Construction Design | Understanding Australia's Past | Conserving Aboriginal and Torres Strait Islander Heritage | Land and water management | Land and water management | Environmental and Natural Resource Evaluation not elsewhere classified | Civil | Water services and utilities | Environment not elsewhere classified | Fresh, Ground and Surface Water Flora, Fauna and Biodiversity
Related Links
Publications
Sensitivity analysis in air-water measurements under highly unsteady flow conditions: the breaking bore
Publisher: The University of Queensland
Date: 2020
DOI: 10.14264/DD7D0CA
Minimum Specific Energy and Transcritical Flow in Unsteady Open-Channel Flow
Publisher: American Society of Civil Engineers (ASCE)
Date: 2016
Turbulence measurements in the bubbly flow region of hydraulic jumps
Publisher: Elsevier BV
Date: 10-2008
Closure to “Minimum Specific Energy and Critical Flow Conditions in Open Channels” by Hubert Chanson
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2008
Energy Dissipation in Hydraulic Structures
Publisher: CRC Press
Date: 12-05-2015
DOI: 10.1201/B18441
Turbulent Measurements in a Small Subtropical Estuary with Semidiurnal Tides
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2008
Environmental Impact of Undular Tidal Bores in Tropical Rivers
Publisher: Springer Science and Business Media LLC
Date: 10-2005
Turbulence characteristics of a small subtropical estuary during and after some moderate rainfall
Publisher: Elsevier BV
Date: 09-2008
Turbulence Measurements with Acoustic Doppler Velocimeters
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2005
Total pressure fluctuations and two-phase flow turbulence in self-aerated stepped chute flows
Publisher: Elsevier BV
Date: 10-2016
Discussion of “Transcritical Flow due to Channel Contraction” by O. Castro-Orgaz, J. V. Giraldez, and J. L. Ayuso
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2009
Turbulent velocity, sediment motion and particle trajectories under breaking tidal bores: simultaneous physical measurements
Publisher: Springer Science and Business Media LLC
Date: 16-05-2014
Discharge through a Permeable Rubble Mound Weir
Publisher: American Society of Civil Engineers (ASCE)
Date: 2005
Tidal Bores, Aegir, Eagre, Mascaret, Pororoca
Publisher: WORLD SCIENTIFIC
Date: 09-2011
DOI: 10.1142/8035
Interparticle arrival time analysis of bubble distributions in a dropshaft and hydraulic jump
Publisher: Informa UK Limited
Date: 10-04-2013
Air–water flow properties in step cavity down a stepped chute
Publisher: Elsevier BV
Date: 09-2011
Experimental measurements of velocity and pressure distributions on a large broad-crested weir
Publisher: Elsevier BV
Date: 06-2007
Application of local optical flow methods to high-velocity free-surface flows: Validation and application to stepped chutes
Publisher: Elsevier BV
Date: 2018
Simple Design Criterion for Residual Energy on Embankment Dam Stepped Spillways
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2016
Turbulent length–time scales distributions in hydraulic jumps
Publisher: Thomas Telford Ltd.
Date: 08-2009
Abstract: Air–water flow measurements were performed in hydraulic jump flows for a range of inflow Froude numbers. The experiments were conducted in a large-sized facility using phase-detection intrusive probes. The void fraction measurements showed the presence of an advective diffusion shear layer where the air concentration vertical distributions were successfully compared with an analytical solution of the advective diffusion equation for air bubbles. In the air–water shear layer, a new empirical relationship between the maximum air concentration decay as a function of both the distance from the jump toe and the inflow Froude number was derived. Air–water turbulent time and length scales were deduced from auto- and cross-correlation analyses based on the method of Chanson (2007). The result provided some characteristic transverse time and length scales of the eddy structures advecting the air bubbles in the developing shear layer. The turbulence time scale data showed an increase with the relative elevation above the bed, as well as some decrease with increasing distance from the toe. The dimensionless integral turbulent length scale L xz /d 1 was closely related to the inflow depth.
Interactions between cavity flow and main stream skimming flows: an experimental study
Publisher: Canadian Science Publishing
Date: 2004
DOI: 10.1139/L03-066
Abstract: In the last two decades, research on the hydraulics of skimming flows down stepped chutes was driven by needs for better design guidelines. Skimming flows are characterized by significant momentum transfer from the main stream to the recirculation zones. Investigations are difficult because of the complex nature of the flow, the strong flow aeration, and the interactions between entrained air and turbulence. This study provides a comprehensive database on main stream and cavity flow interactions in skimming flows down a stepped chute. Measurements were conducted on a large facility (α = 15.9°, h = 0.05 and 0.1 m, W = 1 m) with precise instrumentation based upon a Froude similitude. Air–water velocity and turbulence measurements demonstrated a well-defined mixing layer developing downstream of each step edge in which the velocity profiles had the same shape as classical monophase flow results. A comparative analysis of air–water flow properties for Froude similar flow conditions showed a good agreement between the two step heights in terms of dimensionless distributions of air content, velocity, and turbulence intensity, but dimensionless bubble count rates, turbulence levels, and bubble chord sizes were improperly scaled.Key words: stepped chute, skimming flow, flow recirculation, momentum exchange, physical modelling.
Comment on “Critical flow constrains flow hydraulics in mobile‐bed streams: A new hypothesis” by G. E. Grant
Publisher: American Geophysical Union (AGU)
Date: 03-1999
DOI: 10.1029/1998WR900054
Air entrainment and energy dissipation on Gabion stepped weirs
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.12
Jean-Baptiste Bélanger: hydraulic engineer and academic
Publisher: Thomas Telford Ltd.
Date: 12-2010
DOI: 10.1680/EACM.2010.163.4.227
Abstract: Jean-Baptiste Bélanger (1790–1874) worked as a hydraulic engineer at the beginning of his career. He developed the backwater equation to calculate the free-surface profile of gradually varied, steady open channel flow. He also introduced the concept of critical flow and the numerical technique called the direct step method. Later, as an academic staff member at the leading French engineering schools (Ecole Centrale des Arts et Manufactures, Ecole des Ponts et Chaussées and Ecole Polytechnique), he developed a new university curriculum in mechanics and wrote several textbooks including a seminal text in hydraulic engineering. His influence on his contemporaries was considerable, and his name is written on the border of one of the four façades of the Eiffel Tower. Bélanger's leading role demonstrated the dynamism of practising engineers at the time, and his contributions paved the way to many significant works in hydraulics and fluid dynamics during the late nineteenth and early twentieth centuries.
High resolution GNSS-tracked drifter for studying surface dispersion in shallow water
Publisher: American Meteorological Society
Date: 03-2015
DOI: 10.1175/JTECH-D-14-00127.1
Abstract: The use of Global Navigation Satellite System (GNSS)-tracked Lagrangian drifters allows more realistic quantification of fluid motion and dispersion coefficients than Eulerian techniques because such drifters are analogs of particles that are relevant to flow field characterization and pollutant dispersion. Using the fast-growing real-time kinematic (RTK) positioning technique derived from GNSS, drifters are developed for high-frequency (10 Hz) s ling with position estimates with centimeter accuracy. The drifters are designed with small size and less direct wind drag to follow the subsurface flow that characterizes dispersion in shallow waters. An analysis of position error from stationary observation indicates that the drifter can efficiently resolve motion up to 1 Hz. The result of the field deployments of the drifter in conjunction with acoustic Eulerian devices shows a higher estimate of the drifter streamwise velocities. Single particle statistical analysis of field deployments in a shallow estuarine zone yielded estimates of dispersion coefficients comparable to those of dye tracer studies. The drifters capture the tidal elevation during field studies in a tidal estuary.
Turbulent fluctuations in hydraulic jumps: a physical study
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.15
Overflow Characteristics of Circular Weirs: Effects of Inflow Conditions
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-1998
Turbulent mixing induced by rapid gate opening in a canal
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.13
Mascaret, Aegir, Pororoca, Tidal Bore. Quid ? Où ? Quand ? Comment? Pourquoi ?
Publisher: Informa UK Limited
Date: 05-2005
Turbulence measurements in a small subtropical estuary under king tide conditions
Publisher: Springer Science and Business Media LLC
Date: 11-01-2012
Stability of Individuals during Urban Inundations: What Should We Learn from Field Observations?
Publisher: MDPI AG
Date: 10-09-2018
DOI: 10.3390/GEOSCIENCES8090341
Abstract: The flooding of urbanized areas constitutes a major hazard to populations and infrastructure. Flood flows during urban inundations have been studied only recently and the real-life impact of fluid flows on in iduals is not well understood. The stability of in iduals in floodwaters is re-assessed based upon the re-analysis of detailed field measurements during a major flood event. The results emphasized that hydrodynamic instabilities, linked to local topographic effects and debris, constitute major real-world hazards. A comparison between a number of flow conditions deemed unsafe for in iduals, along with guidelines, suggests that many recommendations are over-optimistic and unsafe in real floodwaters and natural disasters. A series of more conservative guidelines is proposed, particularity relevant to flood events.
Discussion of “Verification and validation of a computational fluid dynamics (CFD) model for air entrainment at spillway aerators” Appears in the Canadian Journal of Civil Engineering 36(5): 826-838.
Publisher: Canadian Science Publishing
Date: 2010
DOI: 10.1139/L09-133
Smart Baffles to Assist Upstream Culvert Passage of Small-Bodied Fish
Publisher: USULibraries
Date: 2018
DOI: 10.15142/T3C061
Turbulence and turbulent flux events in tidal bores: case study of the undular tidal bore of the Garonne River
Publisher: Springer Science and Business Media LLC
Date: 17-11-2018
Near-critical free-surface flows: real fluid flow analysis
Publisher: Springer Science and Business Media LLC
Date: 11-09-2010
Gabion Stepped Spillway: Interactions between Free-Surface, Cavity, and Seepage Flows
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2016
Hybrid modelling of low velocity zones in box culverts to assist fish passage: Why simple is better!
Publisher: Wiley
Date: 09-09-2020
DOI: 10.1002/RRA.3710
Two-phase flow measurements of an unsteady breaking bore
Publisher: Springer Science and Business Media LLC
Date: 14-02-2019
Experimental analysis of Froude number effect on air entrainment in the hydraulic jump
Publisher: Springer Science and Business Media LLC
Date: 25-01-2007
Le Potentiel de vitesse pour les écoulements de fluides réels : la contribution de Joseph-Louis Lagrange
Publisher: Informa UK Limited
Date: 10-2007
DOI: 10.1051/LHB:2007072
Development of the Bélanger Equation and Backwater Equation by Jean-Baptiste Bélanger (1828)
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2009
Measuring air-water interface area in supercritical open channel flow
Publisher: Elsevier BV
Date: 06-1997
Air–water flow properties in hydraulic jumps on rough pebbled bed
Publisher: Informa UK Limited
Date: 05-2023
Undular Tidal Bores: Basic Theory and Free-Surface Characteristics
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2010
Breaking bore: Physical observations of roller characteristics
Publisher: Elsevier BV
Date: 04-2015
Application of optical flow methods to aerated skimming flows above triangular and trapezoidal step cavities
Publisher: Informa UK Limited
Date: 03-09-2019
Hydraulic jumps with low inflow Froude numbers: air–water surface patterns and transverse distributions of two-phase flow properties
Publisher: Springer Science and Business Media LLC
Date: 27-04-2022
DOI: 10.1007/S10652-022-09854-5
Abstract: Hydraulic jumps are commonly employed as energy dissipators to guarantee long-term operation of hydraulic structures. A comprehensive and in-depth understanding of their main features is therefore fundamental. In this context, the current study focused on hydraulic jumps with low Froude numbers, i.e. Fr 1 = 2.1 and 2.4, at relatively high Reynolds number: Re ~2 × 10 5 . Experimental tests employed a combination of dual-tip phase-detection probes and ultra-high-speed video camera to provide a comprehensive characterisation of the main air-water flow properties of the hydraulic jump, including surface flow features, void fraction, bubble count rate and interfacial velocities. The current research also focused on the transverse distributions of air-water flow properties, i.e. across the channel width, with the results revealing lower values of void fraction and bubble count rate next to the sidewalls compared to the channel centreline data. Such a spatial variability in the transverse direction questions whether data near the side walls may be truly representative of the behaviour in the bulk of the flow, raising the issue of sidewall effects in image-based techniques. Overall, these findings provide new information to both researchers and practitioners for a better understanding of the physical processes inside the hydraulic jump with low Froude numbers, leading to an optimised design of hydraulic structures. Experimental investigation of air-water flow properties in hydraulic jumps with low Froude numbers Detailed description of the main air-water surface features on the breaking roller Transversal distribution of the air-water flow properties across the channel width and comparison between centreline and sidewall.
Half-Round Circular Crested Weir: On Hysteresis, Instabilities, and Head–Discharge Relationship
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2020
Experimental investigation of bubbly flow and turbulence in hydraulic jumps
Publisher: Springer Science and Business Media LLC
Date: 19-06-2008
Unsteady calibration of a large V-notch weir
Publisher: No publisher found
Date: 2012
Triple decomposition technique in air–water flows: Application to instationary flows on a stepped spillway
Publisher: Elsevier BV
Date: 2014
Rumble Sound Generated by a Tidal Bore Event in the Baie du Mont Saint Michel
Publisher: No publisher found
Date: 2014
The rumble sound generated by a tidal bore event in the Baie du Mont Saint Michel
Publisher: Acoustical Society of America (ASA)
Date: 06-2009
DOI: 10.1121/1.3124781
Abstract: A tidal bore is a sharp rise in free-surface elevation propagating upstream in an estuarine system at the leading edge of the flood tide. It generates a powerful noise that was sometimes compared to the sounds of a horse cavalcade. Herein the sounds generated by a tidal bore event in the Baie du Mont Saint Michel were carefully recorded. The data showed three distinct periods. These were the incoming tidal bore when the sound litude increased with the approaching bore front, the passage of the tidal bore in front of the microphone where the impacts of the bore on the bank, rocks, or jetty generated powerful noises, and the upstream propagation of the bore when the flood flow motion caused additional loud noises. During the arrival of the tidal bore, the sound levels were less energetic and a lower-pitch sound was noted than during the subsequent record. For the breaking bore process, the analysis of the sound record indicated a dominant frequency around 76–77 Hz. The low-pitch rumble had a frequency comparable to the collective bubble oscillations, suggesting that air entrapment in the bore roller might play a major role in the acoustic signature.
Hybrid modelling of low velocity zones in box culverts to assist upstream fish passage
Publisher: Springer Science and Business Media LLC
Date: 28-06-2020
Experimental study of a positive surge. Part 2: comparison with literature theories and unsteady flow field analysis
Publisher: Springer Science and Business Media LLC
Date: 04-10-2011
Energy dissipation and flow resistance on flat slope stepped spillways
Publisher: The University of Queensland
Date: 2929
DOI: 10.14264/UQL.2014.22
Total pressure fluctuations and two-phase flow turbulence in hydraulic jumps
Publisher: Springer Science and Business Media LLC
Date: 11-2014
Air-water gas transfer at hydraulic jump with partially developed inflow
Publisher: Elsevier BV
Date: 10-1995
Response of GPS-Tracked Drifters to Wind and Water Currents in a Tidal Estuary
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Relative dispersion of clustered drifters in a small micro-tidal estuary
Publisher: Elsevier BV
Date: 07-2017
Hydraulics of Large Culvert beneath Roman Aqueduct of Nı⁁mes
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2002
Hydraulics, Air Entrainment, and Energy Dissipation on a Gabion Stepped Weir
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2014
Hydraulic Performances of Minimum Energy Loss Culverts in Australia
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2007
Reply to discussion by G. Carosi and H. Chanson on “Turbulence characteristics in skimming flows on stepped spillways”Appears in the Canadian Journal of Civil Engineering, 35(9): 865–880.
Publisher: Canadian Science Publishing
Date: 04-2009
DOI: 10.1139/L09-023
Challenging hydraulic structures of the twenty-first century – from bubbles, transient turbulence to fish passage
Publisher: Informa UK Limited
Date: 02-01-2021
Alternative mitigation measures for fish passage in standard box culverts: Physical modelling
Publisher: Elsevier BV
Date: 03-2018
Ritter’s dry-bed dam-break flows: positive and negative wave dynamics
Publisher: Springer Science and Business Media LLC
Date: 09-02-2017
Hydraulics of Rectangular Dropshafts
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2004
Erratum to: Turbulent velocity, sediment motion and particle trajectories under breaking tidal bores: simultaneous physical measurements
Publisher: Springer Science and Business Media LLC
Date: 03-06-2014
Hybrid modelling of low velocity zones in an asymmetrical channel with sidewall longitudinal rib to assist fish passage
Publisher: Wiley
Date: 25-02-2020
DOI: 10.1002/RRA.3600
Hydraulics of stepped chutes: the transition flow
Publisher: Informa UK Limited
Date: 2007
Stepped spillway flows and air entrainment
Publisher: Canadian Science Publishing
Date: 06-1993
DOI: 10.1139/L93-057
Abstract: Stepped spillways have become a popular method for handling flood releases. The steps significantly increase the rate of energy dissipation taking place on the spillway face and reduce the size of the required downstream energy dissipation basin. The compatibility of stepped spillways with roller compacted concrete and gabion construction techniques results in low additional cost for the spillway. This paper presents a review of recent developments for the design of stepped spillways, provides a discussion of the effects of air entrainment, and presents new calculation methods that take into account the effects of flow aeration on the flow characteristics and the rate of energy dissipation. Key words: stepped spillway, air entrainment, dam, spillway, energy dissipation.
Unsteady turbulent properties in negative waves in open channels
Publisher: Elsevier BV
Date: 2013
Discussion of “Transverse Nonuniformity of Air–Water Flow and Lateral Wall Effects in Quasi-Two-Dimensional Hydraulic Jump”
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2023
Breaking bore roller characteristics: Turbulence statistics using optical techniques
Publisher: Elsevier BV
Date: 09-2021
Application of the method of characteristics to the dam break wave problem
Publisher: Informa UK Limited
Date: 2009
Interaction between free-surface, two-phase flow and total pressure in hydraulic jump
Publisher: Elsevier BV
Date: 06-2015
Steady and unsteady turbulent velocity profiling in open channel flows using the ADV Vectrino II profiler
Publisher: USU Libraries
Date: 2016
Image-based measurements of air-water flow properties in plunging air-water jets
Publisher: The University of Queensland
Date: 2020
Utilising the boundary layer to help restore the connectivity of fish habitats and populations. An engineering discussion
Publisher: Elsevier BV
Date: 12-2019
Head-discharge relationship of half-round circular crested weir: on hysteresis and instabilities
Publisher: The University of Queensland
Date: 2020
High-frequency turbulence and suspended sediment concentration measurements in the Garonne River tidal bore
Publisher: Elsevier BV
Date: 12-2011
Discussion of “Cavitation Potential of Flow on Stepped Spillways” by K. Warren Frizell, Floriana M. Renna, and Jorge Matos
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2015
Intrusive and Non-intrusive Air-water Flow Measurements in Breaking Jumps at Low Froude Number and Large Reynolds Number
Publisher: The University of Queensland
Date: 2021
DOI: 10.14264/4A0C07F
Labyrinth and Piano Key Weirs II
Publisher: CRC Press
Date: 21-10-2013
DOI: 10.1201/B15985
Comments on “Fiber optic reflectometer for velocity and fraction ratio measurements in multiphase flows” [Rev. Sci. Instrum. 74, 3559 (2003)]
Publisher: AIP Publishing
Date: 22-12-2003
DOI: 10.1063/1.1634360
Air-water interface area in self-aerated flows
Publisher: Elsevier BV
Date: 04-1994
Discussion of “Discharge through a Permeable Rubble Mound Weir” by Kohji Michioku, Shiro Maeno, Takaaki Furusawa, and Masanori Haneda
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2006
Physical modelling and similitude of air bubble entrainment at vertical circular plunging jets
Publisher: Elsevier BV
Date: 02-2004
Intrusive and non-intrusive two-phase air-water measurements on stepped spillways: A physical study
Publisher: Elsevier BV
Date: 02-2022
Bubble entrainment, spray and splashing at hydraulic jumps
Publisher: Zhejiang University Press
Date: 08-2006
Turbulent time and length scale measurements in high-velocity open channel flows
Publisher: Springer Science and Business Media LLC
Date: 26-01-2007
Discussion of “Auguste Graeff: Dam Designer and Hydraulic Engineer” by Willi H. Hager and Corrado Gisonni
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2008
Inception of bed load motion beneath a bore
Publisher: Elsevier BV
Date: 06-2012
Scale effects in physical hydraulic engineering models By VALENTIN HELLER, Journal of Hydraulic Research, Vol. 49, No. 3 (2011), pp. 293–306
Publisher: Informa UK Limited
Date: 04-2012
Scale effects in microscopic air-water flow properties in high-velocity free-surface flows
Publisher: Elsevier BV
Date: 05-2017
Turbulence and turbulent flux events in a small estuary
Publisher: Springer Science and Business Media LLC
Date: 21-05-2009
Air-water flows on stepped spillways with inclined steps
Publisher: The University of Queensland
Date: 2020
DOI: 10.14264/27B1C79
Three‐dimensional numerical simulations of smooth, asymmetrically roughened, and baffled culverts for upstream passage of small‐bodied fish
Publisher: Wiley
Date: 29-08-2018
DOI: 10.1002/RRA.3346
Comparison between hydrostatic and total pressure simulations of dam-break flows By LEONARDO R. MONTEIRO, LUÍSA V. LUCCHESE and EDITH B. C. SCHETTINI, J. Hydraulic Res. 58(5), 725–737
Publisher: Informa UK Limited
Date: 04-03-2021
Strong interactions between free-surface aeration and turbulence in an open channel flow
Publisher: Elsevier BV
Date: 05-2003
Free-surface fluctuations and turbulence in hydraulic jumps
Publisher: Elsevier BV
Date: 09-2011
Low-Velocity Zone in Smooth Pipe Culvert with and without Streamwise Rib for Fish Passage
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2020
Energy Dissipation down a Stepped Spillway with Nonuniform Step Heights
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2011
Applications of optical flow technique in air-water flows
Publisher: The University of Queensland
Date: 11-12-2020
DOI: 10.14264/D44CA31
Physical modelling of pipe culverts to assist upstream fish passage
Publisher: Wiley
Date: 30-11-2021
DOI: 10.1002/RRA.3905
Abstract: Road crossings and culverts may adversely impact the stream network connectivity and fish habitats of the catchment. Research into the passage of small‐body‐mass fish in pipe culverts has been relatively limited, compared to the literature for box culverts. For small‐bodied and juvenile fish species, the excessive barrel velocities are often a major hindrance, because of their weak swimming capabilities. In the present study, some physical testing of low‐velocity‐zones was undertaken in standard pipe culvert. The physical modelling was conducted under controlled flow conditions to test comparatively three designs, aiming to minimise the change in energy losses and to maximise low‐velocity zones and secondary circulation conducive to small‐body‐mass fish passage. In the whole pipe culvert experiment (Model 1), both baffle and longitudinal rail boundary treatments provided low‐velocity zones. The baffles however induced a strongly turbulent flow, associated with substantially larger energy dissipation than the reference smooth boundary pipe culvert. The longitudinal rail boundary treatment produced energy losses comparable to the smooth boundary reference configuration. Both boundary treatments were tested comparatively at near‐full‐scale (Model 2) to quantify the low‐velocity‐zone (LVZ) characteristics. The small longitudinal rail (0.06 m × 0.02 m), installed at 30° from the centreline, induced some flow asymmetry, as well as some low‐velocity‐zones on both sides of the rail. Some strong secondary motion was further observed as the combined effect of the flow asymmetry and singularities of the rail corners. The secondary motion structure was markedly different, and the distributions of the normal turbulent stresses ( v z ′ 2 − v y ′ 2 ) showed key differences between the two boundary treatments, with the sharp corners of the rail contributing to the generation of secondary motion and in turn slow‐velocity regions facilitating the upstream passage of small‐body‐mass fish species and juveniles of larger fish.
Air–water flows and free-surface profiles on a non-uniform stepped chute
Publisher: Informa UK Limited
Date: 14-02-2014
Free-surface instabilities in high-velocity air-water flows down stepped chutes
Publisher: USULibraries
Date: 2018
DOI: 10.15142/T3XS8P
Turbulence and aeration in hydraulic jumps: free-surface fluctuation and integral turbulent scale measurements
Publisher: Springer Science and Business Media LLC
Date: 21-09-2012
Novel hydraulic guidelines can assist upstream fish passage through smooth box culverts
Publisher: Informa UK Limited
Date: 23-07-2020
Positive surge propagating in an asymmetrical canal
Publisher: Elsevier BV
Date: 06-2020
Teaching Hydraulic Design in an Australian Undergraduate Civil Engineering Curriculum
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2001
Discussion of “Vertical Mixing in the Fully Developed Turbulent Layer of Sediment-Laden Open-Channel Flow” by Erik A. Toorman
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2011
Understanding air–water mass transfer in rectangular dropshafts
Publisher: Thomas Telford Ltd.
Date: 09-2004
DOI: 10.1139/S04-014
Abstract: A dropshaft is a vertical structure connecting two channels with different invert elevations. Four configurations of rectangular dropshafts were investigated systematically to study the effects of outflow direction and pool depth on particle residence times and flow aeration. The best hydraulic design was that with 180° outflow direction and deep pool shaft. For that design, a full-scale study was conducted, the scaling ratio between prototype and model being 3.1:1. Although similar trends were seen in both model and prototype, scale effects were observed in terms of particle residence times and bubble swarm depths. In the prototype, detailed air–water flow measurements were performed in the shaft pool and the mass transfer equation was integrated using measured interfacial areas and particle residence times. The results demonstrate that the air–water mass transfer is the largest at low flow rates (regime R1) because of large residence times and significant interfacial area. Overall the present study provides new understanding of the basic mechanisms of air–water mass transfer in rectangular dropshafts. Key words: dropshaft, mass transfer, aeration, hydraulics.
Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2022
Ensemble-statistical approach in the measurement of air–water flow properties in highly unsteady breaking bores
Publisher: AIP Publishing
Date: 05-2022
DOI: 10.1063/5.0077774
Abstract: Breaking bores are commonly observed in a number of natural processes, often associated with the presence of a transient mixture of air and water, with intense recirculation, air bubble entrainment, and splashing. Two-phase flow measurements in such highly unsteady flows cannot be based on long-duration measurements and require novel ensemble-statistical approaches based on multiple repetitions. Detailed measurements of air–water flow properties were then conducted in a breaking bore with Fr1 = 2.4 using an array of multiple dual-tip phase-detection probes. Based on an extensive experimental program, inclusive of 2000 tests at a single position and 100 tests at multiple elevations, a detailed sensitivity analysis was conducted on the necessary number of repetitions to obtain physically meaningful and statistically reliable air–water flow properties. The results led to a robust methodology to estimate ensemble-statistical values, including confidence intervals and residual error. In addition, these results provided a detailed characterization of the behavior of air–water flow properties in highly unsteady flows, including void fraction, number of interfaces, and bubble chord time/length. Despite the transient nature, all physical processes showed consistent behaviors with theoretical models and other stationary flows, including hydraulic jumps and plunging jets. Overall, this study provided two-phase flow characteristics that go beyond the limitations imposed by the unsteady nature of the flow, proving thoroughly the importance of large datasets for the estimation of air–water flow properties in highly unsteady flows.
Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision
Publisher: Wiley
Date: 17-04-2015
DOI: 10.1002/ESP.3735
Air-water flow properties in breaking bores and stationary jumps with the same Froude number - analogies and dissimilarities
Publisher: The University of Queensland
Date: 2020
Coupling between free-surface fluctuations, velocity fluctuations and turbulent Reynolds stresses during the upstream propagation of positive surges, bores and compression waves
Publisher: Springer Science and Business Media LLC
Date: 27-11-2016
Physical properties of a hydraulic jump with low Froude numbers and relatively high Reynolds numbers
Publisher: The University of Queensland
Date: 2020
Air entrainment and turbulent fluctuations in hydraulic jumps
Publisher: Informa UK Limited
Date: 12-11-2013
Closure to “Negative Surges in Open Channels: Physical and Numerical Modeling” by Martina Reichstetter and Hubert Chanson
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2014
Self-aeration in the rapidly- and gradually-varying flow regions of steep smooth and stepped spillways
Publisher: Springer Science and Business Media LLC
Date: 24-12-2017
Full-height sidewall baffles in box culvert to assist upstream fish passage: physical modelling
Publisher: The University of Queensland
Date: 2020
Self-similarity and scale effects in physical modelling of hydraulic jump roller dynamics, air entrainment and turbulent scales
Publisher: Springer Science and Business Media LLC
Date: 29-06-2016
Hydraulic modelling of pipe culverts and low-velocity zones at less-than-design flows
Publisher: The University of Queensland
Date: 2020
Flow patterns in nappe flow regime down low-gradient stepped chutes
Publisher: Informa UK Limited
Date: 11-2009
The Hydraulics of Roman Aqueducts: What Do We Know? Why Should We Learn?
Publisher: American Society of Civil Engineers
Date: 05-2008
Air Bubble Entrainment, Breakup, and Interplay in Vertical Plunging Jets
Publisher: ASME International
Date: 02-05-2018
DOI: 10.1115/1.4039715
Abstract: The entrainment, breakup, and interplay of air bubbles were observed in a vertical, two-dimensional supported jet at low impact velocities. Ultra-high-speed movies were analyzed both qualitatively and quantitatively. The onset velocity of bubble entrainment was between 0.9 and 1.1 m/s. Most bubbles were entrained as detached bubbles from elongated air cavities at the impingement point. Explosion, stretching, and dejection mechanisms were observed for in idual bubble breakup, and the bubble interaction behaviors encompassed bubble rebound, “kiss-and-go,” coalescence and breakup induced by approaching bubble(s). The effects of jet impact velocity on the bubble behaviors were investigated for impact velocities from 1.0 to 1.36 m/s, in the presence of a shear flow environment.
Modelling small ventilated corner baffles for box culvert barrel
Publisher: Springer Science and Business Media LLC
Date: 27-03-2020
Continuous or catastrophic solid–liquid transition in jammed systems
Publisher: AIP Publishing
Date: 07-12-2004
DOI: 10.1063/1.1823531
Abstract: Pasty materials encountered in industry and in earth science are intermediate between solids and liquids either in terms of their internal structure (disordered but jammed) or from a mechanical point of view. Our results indicate that the apparent behavior of a particulate system (soils, suspensions, clays, etc.) can range from liquid-like to soil or solid-like depending on the relative importance of the energy supplied to it and its “state of jamming” which evolves in time, and the transition from one state to another may appear either continuous or catastrophic.
Field observations in a small subtropical estuary during and after a rainstorm event
Publisher: Elsevier BV
Date: 10-2008
Turbulent velocity measurements in open channel bores
Publisher: Elsevier BV
Date: 03-2012
Interfacial aeration and bubble count rate distributions in a supercritical flow past a backward-facing step
Publisher: Elsevier BV
Date: 05-2008
Turbulent mixing in a small estuary: Detailed measurements
Publisher: Elsevier BV
Date: 2009
Unsteady Turbulence in Tidal Bores: Effects of Bed Roughness
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2010
Turbulence measurements in positive surges and bores
Publisher: Informa UK Limited
Date: 2009
Aeration, Flow Instabilities, and Residual Energy on Pooled Stepped Spillways of Embankment Dams
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2013
Turbulent advances of a breaking bore: Preliminary physical experiments
Publisher: Elsevier BV
Date: 04-2015
New criterion for the stability of a human body in floodwaters
Publisher: Informa UK Limited
Date: 04-07-2015
Unsteady turbulence in expansion waves in rivers and estuaries: an experimental study
Publisher: Springer Science and Business Media LLC
Date: 19-09-2015
Air Entrainment Processes in a Circular Plunging Jet: Void-Fraction and Acoustic Measurements
Publisher: ASME International
Date: 09-2003
DOI: 10.1115/1.1595672
Abstract: Circular plunging jets were studied by both void fraction and acoustic techniques. There were two aims: to measure the structure of the jet flow and its regimes as a function of jet speed and free-jet length and to develop and validate the acoustic measurement technique in the developing flow. Void fractions and bubble count rates were measured in the developing shear layer of a large-size plunging jet d1=25 mm. The data compared well with a solution of an advective diffusion equation and showed an increased air entrainment rate with increasing free-jet length for x1/d1⩽12. The acoustic data were processed by a novel technique to extract both bubble count and bubble size data. Three plunging jet flow regimes were noted. Near inception, acoustic pulses are isolated and indicate in idual bubble entrainment as observable visually. Above a characteristic jet velocity, the number of the bubble pulses increases sharply although bubbles are still produced intermittently. At higher velocities, bubble production becomes quasi-continuous. The study suggests that an acoustic technique calibrated through detailed laboratory measurements can provide useful, absolute data in high-void fraction flows. The robust acoustic sensor can then be used in hostile industrial or environmental flows where more delicate instruments are impractical.
Modelling upstream fish passage in standard box culverts: Interplay between turbulence, fish kinematics, and energetics
Publisher: Wiley
Date: 29-01-2018
DOI: 10.1002/RRA.3245
Unsteady air bubble entrainment and detrainment at a plunging breaker: dominant time scales and similarity of water level variations
Publisher: Elsevier BV
Date: 07-2002
On void fraction and flow fragmentation in two-phase gas-liquid free-surface flows
Publisher: Elsevier BV
Date: 03-2019
Using turbidity and acoustic backscatter intensity as surrogate measures of suspended sediment concentration in a small subtropical estuary
Publisher: Elsevier BV
Date: 09-2008
DOI: 10.1016/J.JENVMAN.2007.07.009
Abstract: The suspended sediment concentration is a key element in stream monitoring, although the turbidity and acoustic Doppler backscattering may be suitable surrogate measures. Herein a series of new experiments were conducted in laboratory under controlled conditions using water and mud s les collected in a small subtropical estuary of Eastern Australia. The relationship between suspended sediment concentration and turbidity exhibited a linear relationship, while the relationships between suspended sediment concentration and acoustic backscatter intensity showed a monotonic increase. The calibration curves were affected by both sediment material characteristics and water quality properties, implying that the calibration of an acoustic Doppler system must be performed with the waters and soil materials of the natural system. The results were applied to some field studies in the estuary during which the acoustic Doppler velocimeter was s led continuously at high frequency. The data yielded the instantaneous suspended sediment flux per unit area in the estuarine zone. They showed some significant fluctuations in instantaneous suspended mass flux, with a net upstream-suspended mass flux during flood tide and net downstream sediment flux during ebb tide. For each tidal cycle, the integration of the suspended sediment flux per unit area data with respect of time yielded some net upstream sediment flux in average.
Two-phase air-water flows in hydraulic jumps at low Froude number: Similarity, scale effects and the need for field observations
Publisher: Elsevier BV
Date: 2022
Negative Surges in Open Channels: Physical and Numerical Modeling
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2013
Estuarine hydrodynamics and morphodynamics: a perspective
Publisher: Informa UK Limited
Date: 02-10-2018
Unsteady turbulence, dynamic similarity and scale effects in bores and positive surges
Publisher: Elsevier BV
Date: 2017
Le développement historique des cascades et fontaines en gradins
Publisher: Informa UK Limited
Date: 10-1998
DOI: 10.1051/LHB/1998084
Air–Water Flow Patterns of Hydraulic Jumps on Uniform Beds Macroroughness
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2018
COASTAL PHOTOGRAPHY BY HUBERT CHANSON
Publisher: Coastal Education and Research Foundation
Date: 09-2009
Sediment processes and flow reversal in the undular tidal bore of the Garonne River (France)
Publisher: Springer Science and Business Media LLC
Date: 07-11-2013
Unsteady air?water flow measurements in sudden open channel flows
Publisher: Springer Science and Business Media LLC
Date: 30-10-2004
Characteristics of clustered particles in skimming flows on a stepped spillway
Publisher: Springer Science and Business Media LLC
Date: 28-09-2012
Intrusive and non-Intrusive air-water measurements on stepped spillways with inclined steps: a physical study on air entrainment and energy dissipation
Publisher: The University of Queensland
Date: 15-05-2021
DOI: 10.14264/E3F4D48
Continuous high-frequency turbulence and suspended sediment concentration measurements in an upper estuary
Publisher: Elsevier BV
Date: 06-2007
Free-Surface Profiles, Velocity and Pressure Distributions on a Broad-Crested Weir: A Physical Study
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2012
Transient secondary currents behind a compression wave in an irregular channel
Publisher: Springer Science and Business Media LLC
Date: 05-0004
Transition flow regime on stepped spillways: air–water flow characteristics and step-cavity fluctuations
Publisher: Springer Science and Business Media LLC
Date: 20-01-2018
Transverse velocity profiling under positive surges in channels
Publisher: Elsevier BV
Date: 12-2018
Current knowledge in tidal bores and their environmental, ecological and cultural impacts
Publisher: Springer Science and Business Media LLC
Date: 11-12-2009
Discussion of “Turbulence Measurements with Acoustic Doppler Velocimeters” by Carlos M. García, Mariano I. Cantero, Yarko Niño, and Marcelo H. García
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2007
Hydraulic structures and society - Engineering challenges and extremes in perspective
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.9
Air entrainment in hydraulic engineering
Publisher: CRC Press
Date: 17-05-0008
Air–water flows down stepped chutes: turbulence and flow structure observations
Publisher: Elsevier BV
Date: 11-2002
Characteristics of flow fluctuations in a tide-dominated estuary: Application of triple decomposition technique
Publisher: Elsevier BV
Date: 03-2019
Drag reduction in open channel flow by aeration and suspended load
Publisher: Informa UK Limited
Date: 1994
Froude Similitude and Scale Effects Affecting Air Entrainment in Hydraulic Jumps
Publisher: American Society of Civil Engineers
Date: 05-2008
Turbulence and Energy Dissipation in the Developing Non-Aerated and the Fully-Developed Aerated Flows on a Stepped Spillway
Publisher: USU Libraries
Date: 2016
Turbulent Mixing beneath an Undular Bore Front
Publisher: Coastal Education and Research Foundation
Date: 07-2008
DOI: 10.2112/06-0688.1
Comment on “Incipient air entrainment in a translating axisymmetric plunging laminar jet” [Phys. Fluids 14, 781 (2002)]
Publisher: AIP Publishing
Date: 07-08-2002
DOI: 10.1063/1.1493789
Bernoulli Theorem, Minimum Specific Energy, and Water Wave Celerity in Open-Channel Flow
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2009
Arch Dams, Development from Cut-Stone Arches to Modern Design
Publisher: Springer Netherlands
Date: 2012
Discussion of “Hydraulics of Broad-Crested Weirs with Varying Side Slopes” by J. E. Sargison and A. Percy
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2010
Flow Characteristics of Skimming Flows in Stepped Channels
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2004
Bubbly Two-Phase Flow in Hydraulic Jumps at Large Froude Numbers
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2011
Turbulent air–water flows in hydraulic structures: dynamic similarity and scale effects
Publisher: Springer Science and Business Media LLC
Date: 25-06-2008
Negative surges and unsteady turbulent mixing induced by rapid gate opening in a channel
Publisher: Elsevier BV
Date: 05-2015
Rapid operation of a Tainter gate: generation process and initial upstream surge motion
Publisher: Springer Science and Business Media LLC
Date: 29-04-2016
Can we improve the non-intrusive characterization of high-velocity air–water flows? Application of LIDAR technology to stepped spillways
Publisher: Informa UK Limited
Date: 08-04-2020
Momentum Considerations in Hydraulic Jumps and Bores
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2012
Hydrodynamics and secondary currents in an asymmetrical rectangular canal with streamwise beam
Publisher: Informa UK Limited
Date: 17-02-2020
‘Re-placing’ professional practice
Publisher: Wiley
Date: 04-2021
DOI: 10.1111/AJR.12717
Abstract: While preparation for professional practice is conceived as placeless, it is enacted in place. Consequently, many professionals find themselves working in conditions significantly different than those they were educated in and for. This is especially relevant for new professionals arriving in rural settings after preparation in urban programs, where metrocentric models of orientation to practice are implicitly privileged. The consequent dis‐join between practice and place often results in new professionals feeling ‘out of place’ and questioning their professional competence. It also results in settings outside the metrocentric norm being viewed as less desirable practice contexts. Negative desirability hinders professional recruitment, while feeling out of place and incompetent hinders professional retention both are longstanding issues in rural communities. Recent developments in professional education and practice standards emphasise adaptability to practise in specific contexts. However, ‘context,’ a primary focus to date for rural preparation is presented as a largely static backdrop that needs to be accommodated to engage in the ‘real practice’ one was trained for. Drawing on the spatial turn in social theory, we argue that place both shapes and is shaped by professionals and their practices and as such, must be engaged with deeply and dynamically. This conceptualisation of the relationship between place and practice has critical implications for professional preparation. As interdisciplinary practitioners and researchers working in erse contexts, we examine ‘place’ from a social constructivist perspective as a focal point for professional preparation.
Discussion and Closure: Use of Rubber Dams for Flood Mitigation in Hong Kong
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-1998
Two-phase air-water flow properties in hydraulic jump at low froude number: Scale effects in physical modelling
Publisher: The University of Queensland
Date: 04-02-2021
DOI: 10.14264/B6BF13F
How full-height sidewall baffles affect box culvert capacity: balancing fish passage and discharge requirements
Publisher: Informa UK Limited
Date: 02-07-2020
Hydraulic jumps and breaking bores: Modelling and analysis
Publisher: Thomas Telford Ltd.
Date: 03-2017
Abstract: In open channel flows, the transition from a rapid to fluvial flow motion is called a hydraulic jump. A related flow motion is a compression wave in a channel, such as a tidal bore or surge. A key feature of hydraulic jumps and breaking bores is the rapid spatial and temporal deformations of the free surface of the roller region, in response to the interactions between entrained air bubbles and turbulent structures. The flow structure in the roller remains a great research challenge due to large quantities of entrained air, bubble–turbulence interactions and the coupling between turbulent properties and free-surface deformations. Breaking bores and hydraulic jumps with a marked roller present a number of similar features that are discussed herein. Recent results have shown that the roller is a highly unsteady turbulent region, with both the roller toe and free surface constantly fluctuating with time and space, although the roller shape is quasi-two-dimensional on average. Downstream of the roller toe, air bubbles and vorticity are diffused in the shear zone at different rates. The double diffusive convection process leads to a complex interplay between instantaneous free-surface deformations, velocity fluctuations and interfacial processes including breakup and coalescence.
Intrusive measurements of air-water flow properties in highly turbulent supported plunging jets and effects of inflow jet conditions
Publisher: Elsevier BV
Date: 02-2018
On upstream fish passage in standard box culverts: interactions between fish and turbulence
Publisher: Informa UK Limited
Date: 02-01-2018
Characterisation of transverse turbulent motion in quasi-two-dimensional aerated flow: Application of four-point air-water flow measurements in hydraulic jump
Publisher: Elsevier BV
Date: 2019
Turbulence manipulation in air–water flows on a stepped chute: An experimental study
Publisher: Elsevier BV
Date: 07-2008
Environmental fluid mechanics in hydraulic engineering
Publisher: Springer Science and Business Media LLC
Date: 06-03-2020
Digital Publishing, Indexing, and Ethics: Implications in Civil and Hydraulic Engineering and Research
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2009
Sediment inception under breaking tidal bores
Publisher: Elsevier BV
Date: 04-2012
Impact of a large cylindrical roughness on tidal bore propagation
Publisher: Canadian Science Publishing
Date: 08-2016
Abstract: A tidal bore is a hydrodynamic shock, surging upstream in some shallow-water bays and estuaries during the flood tide under large tidal range. This study investigates experimentally the propagation of tidal bores over a large cylindrical roughness element, representative of damaged bridge pier foundation. In the initially steady flow, the large cylindrical element generated a wake region, with extents comparable to steady flow literature. During the tidal bore propagation, the presence of the element had negligible effect on the free-surface properties, but a significant impact in terms of the instantaneous velocity and Reynolds stresses. This resulted in longer transient recirculation both upstream and downstream of the element and larger maximum velocity recirculation magnitudes, as well as enhanced turbulent stress levels and potential bed erosion around the large element, within two diameters from the element centre. The results showed the potential development of a large scour hole around the cylindrical element.
Decelerating bores in channels and estuaries
Publisher: Informa UK Limited
Date: 02-10-2018
Turbulent shear stresses in hydraulic jumps, bores and decelerating surges
Publisher: Wiley
Date: 24-01-2011
DOI: 10.1002/ESP.2031
Are breaking waves, bores, surges and jumps the same flow?
Publisher: Springer Science and Business Media LLC
Date: 08-2016
Effects of Step and Cavity Shapes on Aeration and Energy Dissipation Performances of Stepped Chutes
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2018
Tidal bore hydrodynamics and sediment processes: 2010-2016 field observations in France
Publisher: Informa UK Limited
Date: 02-10-2018
Phase-detection probe measurements in high-velocity free-surface flows including a discussion of key sampling parameters
Publisher: Elsevier BV
Date: 02-2015
Embankment overtopping protection systems
Publisher: Springer Science and Business Media LLC
Date: 23-12-2014
Air bubble entrainment in breaking bores: Physical and numerical CFD modelling
Publisher: USULibraries
Date: 2018
DOI: 10.15142/T3FS9Q
Discussion of Characteristics of free overfall for supercritical flows
Publisher: Canadian Science Publishing
Date: 08-2007
DOI: 10.1139/L07-102
Progress in the observation and modeling of turbulent multi-phase flows
Publisher: Springer Science and Business Media LLC
Date: 10-03-2009
Flow resistance in skimming flows in stepped spillways and its modelling
Publisher: Canadian Science Publishing
Date: 12-2002
DOI: 10.1139/L02-083
Abstract: Dams and weirs must be equipped with adequate flood-release facilities for a safe dissipation of the kinetic energy of the flow. With stepped spillway design, it is essential to accurately predict the flow-resistance contribution of the steps. The authors investigate the flow resistance of skimming flows and associated form losses. Recent laboratory experiments were systematically performed with channel slopes ranging from 5.7° up to 55° and the results are compared with existing laboratory and prototype data. The results provide a better understanding of the basic flow patterns and flow-resistance mechanisms and emphasize that form loss is dominant. Simple analytical models provide a reasonable order of magnitude of the pseudo-boundary shear stress and the recirculation cavity ejection frequency. Altogether, more than 38 model studies and four prototype investigations (for a total of more than 700 data points) are reanalysed.Key words: stepped spillway, flow resistance, skimming flow, form drag, physical and analytical modelling.
Interaction between free-surface aeration and total pressure on a stepped chute
Publisher: Elsevier BV
Date: 06-2016
Developing Cost-Effective Design Guidelines for Fish-Friendly Box Culverts, with a Focus on Small Fish
Publisher: Springer Science and Business Media LLC
Date: 05-2019
DOI: 10.1007/S00267-019-01167-6
Abstract: Low-level river crossings can have negative impacts on freshwater ecosystems, including blocking upstream fish passage. In order to restore upstream fish passage in culverts, we developed physically-based design methods to yield cost-effective culvert structures in order to maintain or restore waterway connectivity for a range of small-bodied fish species. New guidelines are proposed for fish-friendly multi-cell box culvert designs based upon two basic concepts: (1) the culvert design is optimised for fish passage for small to medium water discharges, and for flood capacity for larger discharges, and (2) low-velocity zones in the culvert barrel are defined in terms of a percentage of the wetted flow area where the local longitudinal velocity component is less than a characteristic fish speed linked to swimming performances of targeted fish species. This approach is novel and relies upon an accurate physically-based knowledge of the entire velocity field in the barrel, specifically the longitudinal velocity map, because fish tend to target low-velocity zone (LVZ) boundaries. The influence of the relative discharge threshold Q
Air–Water Mass Transfer on a Stepped Waterway
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2005
Two-dimensional bubble clustering in hydraulic jumps
Publisher: Elsevier BV
Date: 11-2015
Integral turbulent scales in unsteady rapidly varied open channel flows
Publisher: Elsevier BV
Date: 02-2017
Diffusion: basic theory
Publisher: Elsevier
Date: 2004
Book Review
Publisher: Cambridge University Press (CUP)
Date: 25-09-2018
DOI: 10.1017/JFM.2018.658
Two-dimensional integral turbulent scales in compression wave in a canal
Publisher: Elsevier BV
Date: 04-2019
Advanced post-processing and correlation analyses in high-velocity air–water flows
Publisher: Springer Science and Business Media LLC
Date: 02-10-2007
Physical Modelling, Scale Effects, and Self-Similarity of Stepped Spillway Flows
Publisher: American Society of Civil Engineers
Date: 05-2008
Physical Modeling of Unsteady Turbulence in Breaking Tidal Bores
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2012
Tidal bore progressing on a small slope
Publisher: Elsevier BV
Date: 11-2017
Certains aspects de la conception hydraulique des aqueducs romains
Publisher: Informa UK Limited
Date: 10-2002
DOI: 10.1051/LHB/2002084
An experimental study on air carryunder due to a plunging liquid jet
Publisher: Elsevier BV
Date: 06-1994
Turbulence and Suspended Sediment Measurements in an Urban Environment during the Brisbane River Flood of January 2011
Publisher: American Society of Civil Engineers (ASCE)
Date: 02-2013
Closure to “Minimum Specific Energy and Transcritical Flow in Unsteady Open-Channel Flow” by Oscar Castro-Orgaz and Hubert Chanson
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2016
Discussion of “Inception Point Relationship for Flat-Sloped Stepped Spillways” by Sherry L. Hunt and Kem C. Kadavy
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2012
Aeration performances of a gabion stepped weir with and without capping
Publisher: Springer Science and Business Media LLC
Date: 09-05-2004
Experimental study of flash flood surges down a rough sloping channel
Publisher: American Geophysical Union (AGU)
Date: 03-2004
DOI: 10.1029/2003WR002662
Two-Phase Flow Characteristics of Stepped Spillways
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2003
A physical study of air–water flow in planar plunging water jet with large inflow distance
Publisher: Elsevier BV
Date: 03-2018
Experimental study of the air–water shear flow in a hydraulic jump
Publisher: Elsevier BV
Date: 04-2000
Hydraulics of aerated flows:qui pro quo?
Publisher: Informa UK Limited
Date: 06-2013
Depth-Averaged Specific Energy in Open-Channel Flow and Analytical Solution for Critical Irrotational Flow over Weirs
Publisher: American Society of Civil Engineers (ASCE)
Date: 2014
Experimental analysis of local void fraction measurements for boiling hydrocarbons in complex geometry – Discussion
Publisher: Elsevier BV
Date: 03-2008
Asymmetrical Wall Baffles to Assist Upstream Fish Passage in Box Culvert: Physical Modeling
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2020
Overtopping Breaching of Noncohesive Homogeneous Embankments
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2002
Detailed measurements during a transient front in a small subtropical estuary
Publisher: Elsevier BV
Date: 07-2007
Environmental hydraulic engineering: a perspective
Publisher: Springer Science and Business Media LLC
Date: 13-05-2015
Two-phase flow measurements in turbulent hydraulic jumps
Publisher: Elsevier BV
Date: 06-2009
Discussion of “Study of Air-Ventilated Cavity under Model Hull on Water Surface” by K.I. Matveev, T.J. Burnett, and A.E. Ockfen
Publisher: Elsevier BV
Date: 10-2010
Hydraulic Engineering Legends Listed on the Eiffel Tower
Publisher: American Society of Civil Engineers
Date: 08-05-2009
DOI: 10.1061/41032(344)1
Unsteady surge characteristics in semi-circular channels
Publisher: The University of Queensland
Date: 11-12-2020
DOI: 10.14264/805A21A
Linguistically diverse general practice teaching.
Publisher: Wiley
Date: 16-10-2019
DOI: 10.1111/TCT.12951
Abstract: Learning about general practice in a context of linguistic ersity is an understudied area. There may be additional learning needs or unrecognised opportunities in this environment. This study explores the experiences of general practitioners (GPs) and medical students on placement where consultations are conducted in a language other than English (LOTE). We conducted 19 semi-structured interviews with medical students and GP supervisors who consult in LOTE. We explored experiences of learning, and teaching strategies implemented by GP supervisors. Thematic analysis was undertaken. Participants reported that LOTE consultations provided unique learning opportunities, including use of interpreters and development of cross-cultural communication skills. Facilitators to learning included the GP engaging the student in the consultation by interpreting, and patients being open to student participation. Some students described language as a barrier to learning, where they had difficulty in following the consultation. Time required for interpreting limited interaction and learning in GP consultations. We identified ways to navigate the language barrier including the GP acting as interpreter, and students learning key phrases in the consultation language to build rapport. Learning in the linguistically erse General Practice environment can be optimised through an active and collaborative approach between the GP, student, and patients. Our findings highlight specific barriers and facilitators to learning. Our participants identified a variety of techniques, including skills in interpreter use and cross-cultural communication skills which can transcend language barriers, to create valuable opportunities for medical students to learn in this setting. Medical students increasingly experience clinical placements in general practices within erse communities.
Indigenous fish traps and fish weirs on the Darling (Baaka) River, south‐eastern Australia, and their influence on the ecology and morphology of the river and floodplains
Publisher: Wiley
Date: 12-2023
DOI: 10.1002/ARCO.5279
Abstract: Fish traps and fish weirs built by Indigenous people in the Barwon‐Darling River system of the Murray Darling Basin (MDB), south‐eastern Australia, are an important component of their traditional social, spiritual and economic systems. The celebrated Brewarrina stone fish traps ( Ngunnhu ) on the Barwon River are the largest and best documented stone fish traps in the Basin. However, there has been minimal research on the many other stone fish traps in this system. This paper focusses on the in‐stream stone fish traps downstream of Brewarrina along the Darling (Baaka) River, some still partly extant, remembered, or documented in historical material. Wooden and earthen bank fish traps and weirs, while not as enduring and archaeologically visible as stone fish traps, were frequently used on the Darling (Baaka) floodplain lakes, sw s and billabongs. Archaeological evidence, traditional cultural knowledge and historical materials are utilised to document the complex social processes and modification of landscapes associated with fish traps and weirs. By demonstrating that Barkandji were active and successful managers of the river and its ecology prior to colonisation, and that much of this cultural knowledge is retained by current generations, the authors make a case for them to renew their custodianship and a decision‐making role in water management.
Flow patterns and free-surface dynamics in hydraulic jump on pebbled rough bed
Publisher: Thomas Telford Ltd.
Date: 02-2023
Abstract: Some basic characteristics of a classic hydraulic jump flow over a pebbled rough bed, as well as on a smooth bed as a reference, are presented in this experimental study. For the experiments, an inflow Froude number Fr 1 from 1.54 to 4.94 and inflow Reynolds number Re 1 from 42 000 to 230 000 were considered. Visual observations and measurements suggested some differences between the formation of a hydraulic jump on rough and smooth bed configurations, including different air entrainment processes, larger vortical structures in the roller length and stronger backward flow in the upper layer. Furthermore, the jump roller and aerated flow lengths were shorter on a pebbled rough bed than on a smooth bed, while the dimensionless advection velocity of large vortices was the same for both bed types. The instantaneous jump toe perimeter showed the largest variation at the largest Fr 1 and was generally larger on rough bed than on smooth bed. Larger oscillations of the free-surface profile were observed on smooth bed, highlighting that roughness resulted in smaller free-surface oscillations, suggesting the higher rate of energy dissipation.
CFD modeling of tidal bores: Development and validation challenges
Publisher: Informa UK Limited
Date: 22-08-2018
Caractéristiques diphasiques des écoulements sur les coursiers en marches d'escalier
Publisher: Informa UK Limited
Date: 12-2001
DOI: 10.1051/LHB/2001084
Numerical simulation of a weak breaking tidal bore
Publisher: Elsevier BV
Date: 2010
A Numerical Simulation of a Tidal Bore Flow
Publisher: Informa UK Limited
Date: 09-2010
Aeration and air–water mass transfer on stepped chutes with embankment dam slopes
Publisher: Springer Science and Business Media LLC
Date: 06-08-2014
Robust estimators for free surface turbulence characterization: a stepped spillway application
Publisher: Elsevier BV
Date: 12-2020
Effect of Froude number on bubble clustering in a hydraulic jump
Publisher: Informa UK Limited
Date: 08-2010
Hydrodynamic shock in Rivers: Physical and numerical modeling of flow structures in tsunami-like bores
Publisher: AIP Publishing
Date: 10-2023
DOI: 10.1063/5.0161096
Physical modelling and scale effects of air-water flows on stepped spillways
Publisher: Zhejiang University Press
Date: 03-2005
Air-water flow properties in stepped chutes with modified step and cavity geometries
Publisher: Elsevier BV
Date: 02-2018
Strong free-surface turbulence in breaking bores: a physical study on the free-surface dynamics and air–water interfacial features
Publisher: Cambridge University Press (CUP)
Date: 11-08-2021
DOI: 10.1017/JFM.2021.614
Enhancing Students’ Motivation in the Undergraduate Teaching of Hydraulic Engineering: Role of Field Works
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2004
Minimum Specific Energy and Critical Flow Conditions in Open Channels
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2006
Free-surface fluctuations in hydraulic jumps: Experimental observations
Publisher: Elsevier BV
Date: 10-2009
Reservoir Sedimentation in Australia under Extreme Conditions
Publisher: Springer Netherlands
Date: 2012
Singular air entrapment at vertical and horizontal supported jets: plunging jets versus hydraulic jumps
Publisher: Springer Science and Business Media LLC
Date: 21-04-2020
Air Entrainment in the Developing Flow Region of Plunging Jets—Part 2: Experimental
Publisher: ASME International
Date: 09-1997
DOI: 10.1115/1.2819287
Abstract: When a water jet impinges a pool of water at rest, air bubbles may be entrained and carried away below the pool free surface: this process is called plunging jet entrainment. The study presents new experimental data obtained with a vertical supported jet. Distributions of air concentration and mean air-water velocity, and bubble chord length distributions measured in the developing shear layer are presented. The results indicate that the distributions of void fraction follow closely analytical solution of the diffusion equation. Further, the momentum shear layer and the air bubble diffusion layer do not coincide. Chord length data show a wide range of air bubble sizes and overall the experimental results suggest strong interactions between the entrained air bubbles and the momentum transfer mechanisms.
Compression waves in semi-circular channel
Publisher: Thomas Telford Ltd.
Date: 10-2022
Abstract: Partially filled pipe flows are commonly observed in urban hydraulics, sewers and road crossings. The occurrence of a compression wave in the confined space may result from flash flooding, transient operation or accidental blockage, inducing explosive conditions. In this study, the propagation of a compression wave was studied in a relatively large laboratory flume of semi-circular cross-section. The unsteady flow properties were recorded to understand how the circular cross-sectional shape impacted the surging water propagation. Both free-surface and velocity data indicated a marked impact of the compression wave passage, with large instantaneous fluctuations comparable to and sometimes larger than observations of compression waves in rectangular channels.
Air Entrainment in the Developing Flow Region of Plunging Jets—Part 1: Theoretical Development
Publisher: ASME International
Date: 09-1997
DOI: 10.1115/1.2819286
Abstract: Air-water bubbly flows are encountered in many engineering applications. One type of air-water shear flows is the developing flow region of a plunging jet. The mechanisms of air entrainment by plunging liquid jets are discussed in the light of new experimental evidence. Then the air bubble diffusion is analyzed analytically in the near-flow field of both circular and two-dimensional plunging jets. The theoretical developments are compared with existing circular plunging jet data and new experiments performed with a two-dimensional vertical supported jet. The study highlights two mechanisms of air entrainment at the plunge point depending upon the jet impact velocity and results suggest that the dispersion of air bubbles within the shear layer is primarily an advective diffusion process.
Unsteady velocity profiling in bores and positive surges
Publisher: Elsevier BV
Date: 04-2017
Physical study of the 3-dimensional characteristics and free-surface properties of a breaking roller in bores and surges
Publisher: Elsevier BV
Date: 04-2020
Explicit equations for critical depth in open channels with complex compound cross sections. A discussion
Publisher: Elsevier BV
Date: 03-2013
Tsunami Surges on Dry Coastal Plains: Application of Dam Break Wave Equations
Publisher: Informa UK Limited
Date: 12-2006
Self-aeration and turbulence in a stepped channel: Influence of cavity surface roughness
Publisher: Elsevier BV
Date: 12-2006
Physical and numerical modelling of air-water flows: An Introductory Overview
Publisher: Elsevier BV
Date: 09-2021
Turbulent mixing of particles under tidal bores: an experimental analysis
Publisher: Informa UK Limited
Date: 10-2010
Phase-detection measurements in free-surface turbulent shear flows
Publisher: Oxford University Press (OUP)
Date: 31-03-2016
Turbulent shear flows
Publisher: Elsevier
Date: 2004
Estimate of void fraction and air entrainment flux in hydraulic jump using Froude number
Publisher: Canadian Science Publishing
Date: 02-2018
Abstract: Hydraulic jumps are induced in hydraulic facilities for the purposes of energy dissipation or flow aeration. Presently there is no means for a simple estimate of void fraction distribution and air entrainment flux, without detailed physical modelling. This paper presents a semi-theoretical model to simulate the void fraction and velocity distributions in hydraulic jumps characterized by partially-developed inflow conditions. Relationships were established between the inflow Froude number, jump roller length and key parameters that determine the full expression of void fraction and velocity profiles. The proposed model enables accurate prediction of void fraction, longitudinal velocity, and air flux using the inflow Froude number. The results indicated considerable air flux contribution of free-surface aeration, in addition to the singular air entrainment at the jump toe, for moderate to large Froude numbers. A Froude number between 8 and 9 tended to achieve highest aeration rate with maximum total air flux in the roller.
Air–water flow measurements in a flat slope pooled stepped waterway
Publisher: Canadian Science Publishing
Date: 04-2013
Abstract: Air–water flows on stepped spillways were investigated experimentally in the last decades with a focus on steep slope chutes equipped with flat horizontal steps. Detailed air–water flow properties were recorded herein with three stepped geometries down a slope of θ = 8.9° with: flat horizontal steps, pooled steps, and a combination of flat and pooled steps. The data included the distributions of basic air–water flow properties, as well as the energy dissipation and flow resistance data deduced from the air–water flow measurements. The results on the flat slope showed that the pooled stepped design enabled a greater rate of energy dissipation, but the pooled stepped geometries were affected by some flow instabilities and unsteady flow processes for a range of flow rates.
On unsteady velocity measurements and profiling in compression waves in an asymmetrical trapezoidal channel
Publisher: Elsevier BV
Date: 04-2020
Estimating void fraction in a hydraulic jump by measurements of pixel intensity
Publisher: Springer Science and Business Media LLC
Date: 03-01-2012
Hydraulic Design of Stepped Spillways
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2003
Discussion of “Performance of Intrusive Phase-Detection Probe with Large Sensor Size in Air-Water Flow Measurement and Application to Prototype Hydraulic Jump Study”
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2023
Experimental assessment of scale effects affecting two-phase flow properties in hydraulic jumps
Publisher: Springer Science and Business Media LLC
Date: 07-04-2008
Unsteady discharge calibration of a large V-notch weir
Publisher: Elsevier BV
Date: 03-2013
Propagation of surge waves in channels with large-scale bank roughness
Publisher: Informa UK Limited
Date: 12-2013
Human body stability in floodwaters: The 2011 flood in Brisbane CBD
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.48
Bubbly flow structure in hydraulic jump
Publisher: Elsevier BV
Date: 05-2007
Dam Break Wave of Thixotropic Fluid
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2006
Using small triangular baffles to facilitate upstream fish passage in standard box culverts
Publisher: Springer Science and Business Media LLC
Date: 23-06-2019
Undular and breaking bores on fixed and movable gravel beds
Publisher: Informa UK Limited
Date: 08-2012
Physical modelling of breaking tidal bores: comparison with prototype data
Publisher: Informa UK Limited
Date: 13-01-2015
Two-phase air-water flows: Scale effects in physical modeling
Publisher: Springer Science and Business Media LLC
Date: 04-2014
Sediment Motion beneath Surges and Bores
Publisher: USULibraries
Date: 2018
DOI: 10.15142/T3B340
Atmospheric noise of a breaking tidal bore
Publisher: Acoustical Society of America (ASA)
Date: 2016
DOI: 10.1121/1.4939113
Abstract: A tidal bore is a surge of waters propagating upstream in an estuary as the tidal flow turns to rising and the flood tide propagates into a funnel-shaped system. Large tidal bores have a marked breaking roller. The sounds generated by breaking tidal bores were herein investigated in the field (Qiantang River) and in laboratory. The sound pressure record showed two dominant periods, with some similarity with an earlier study [Chanson (2009). J. Acoust. Soc. Am. 125(6), 3561–3568]. The two distinct phases were the incoming tidal bore when the sound litude increased with the approaching bore, and the passage of the tidal bore in front of the microphone when loud and powerful noises were heard. The dominant frequency ranged from 57 to 131 Hz in the Qiantang River bore. A comparison between laboratory and prototype tidal bores illustrated both common features and differences. The low pitch sound of the breaking bore had a dominant frequency close to the collective oscillations of bubble clouds, which could be modeled with a bubble cloud model using a transverse dimension of the bore roller. The findings suggest that this model might be over simplistic in the case of a powerful breaking bore, like that of the Qiantang River.
Physical modelling of semi-circular channels and low velocity zones - application to pipe culverts and upstream fish passage at less-than-design flows
Publisher: School of Civil Engineering, The University of Queensland
Date: 24-10-2019
DOI: 10.14264/1ED47E8
Effect of a large bed roughness on positive surge propagation in canals
Publisher: USU Libraries
Date: 2016
“Vegan” culvert: application of hybrid modelling in modern hydraulic structures
Publisher: The University of Queensland
Date: 2020
Air Concentration Distribution In Self-Aerated Flow
Publisher: Informa UK Limited
Date: 07-1995
Effects of Step Pool Porosity upon Flow Aeration and Energy Dissipation on Pooled Stepped Spillways
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2014
Research quality, publications, and impact in civil engineering into the 21st century. Publish or perish, commercial versus open access, Internet versus libraries?
Publisher: Canadian Science Publishing
Date: 08-2007
DOI: 10.1139/L07-027
Abstract: A research project is only completed when it has been published and shared with the community. Referees and peer experts play an important role in controlling the research quality. While some new electronic tools provide further means of disseminating some research information, the quality and impact of the works remain linked with some thorough expert-review process and publication in international scientific journals and books unethical publishing standards are not acceptable. The writer argues that the new electronic aids do not replace scholarship or critical thinking, although they have an impact on the working environment of civil engineers.Key words: research publications, quality, impact, peer reviews.
Flow aeration, cavity processes and energy dissipation on flat and pooled stepped spillways for embankments
Publisher: Springer Science and Business Media LLC
Date: 27-03-2013
Study of Air Demand on Spillway Aerator
Publisher: ASME International
Date: 09-1990
DOI: 10.1115/1.2909410
Hydraulic structures: challenges, diversity, ecology, energy dissipation, hydrodynamics of the 21st century
Publisher: The University of Queensland
Date: 2020
Free-Surface Aeration in a Steep Stepped Spillway
Publisher: USU Libraries
Date: 2016
Preface
Publisher: Springer Science and Business Media LLC
Date: 26-11-2007
Bubble Entrainment and Dispersion in Plunging Jet Flows: Freshwatervs.Seawater
Publisher: Coastal Education and Research Foundation
Date: 05-2006
DOI: 10.2112/03-0112.1
Energy Dissipation and Air Entrainment in Stepped Storm Waterway: Experimental Study
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2002
On optical flow techniques applied to breaking surges
Publisher: Elsevier BV
Date: 04-2020
Free surface profiles of near-critical instabilities in open channel flows: undular hydraulic jumps
Publisher: Springer Science and Business Media LLC
Date: 19-06-2021
Turbulence, dynamic similarity and scale effects in high-velocity free-surface flows above a stepped chute
Publisher: Springer Science and Business Media LLC
Date: 20-02-2009
Un hydraulicien d'exception bien en avance sur son époque : Jean-Baptiste Charles Joseph Bélanger (1790-1874)
Publisher: Informa UK Limited
Date: 10-2009
DOI: 10.1051/LHB/2009072
Closure to “Simple Design Criterion for Residual Energy on Embankment Dam Stepped Spillways” by Stefan Felder and Hubert Chanson
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2017
Air–water flow characteristics in high-velocity free-surface flows with 50% void fraction
Publisher: Elsevier BV
Date: 10-2016
Large Eddy Simulation of turbulence generated by a weak breaking tidal bore
Publisher: Springer Science and Business Media LLC
Date: 13-01-2010
An experimental study of turbulent two-phase flow in hydraulic jumps and application of a triple decomposition technique
Publisher: Springer Science and Business Media LLC
Date: 07-2014
Hydraulic jumps: turbulence and air bubble entrainment
Publisher: Informa UK Limited
Date: 06-2011
DOI: 10.1051/LHB/2011026
Environmental multi-phase fluid mechanics: what, why, how, where to?
Publisher: Springer Science and Business Media LLC
Date: 02-12-2016
Spatial variation in physio-chemistry in a small river estuary
Publisher: Thomas Telford Ltd.
Date: 10-2008
DOI: 10.1680/WAMA.2008.161.5.241
Abstract: Understanding of riverine and estuarine mixing processes remains limited, and predictions are highly sensitive to specific features of natural systems. One reason for this is the very complex variations of hydrodynamic and physio-chemical properties with the tidal phase. This study presents the results of two field works during which a range of flow and chemical parameters were recorded simultaneously at several locations along a small sub-tropical estuary. The studies were conducted in contrasting (wet and dry) conditions. Field measurements indicated that the hydrodynamics and water conductivity were dominated by tidal forcing and, to a lesser extent, by freshwater inputs. There were generally significantly greater differences between longitudinal sites than between vertical depths, although some marked differences were observed between the upper and lower estuarine zones. The comparative results between wet and dry field studies illustrated some marked stratification in wet weather along the whole of the estuary, implying that the surface s les were not representative of the average water column properties. Overall, the complexity of the hydrodynamics and water quality has some impact on water quality modelling of the system.
Experimental investigations of air entrainment in transition and skimming flows down a stepped chute
Publisher: Canadian Science Publishing
Date: 02-2002
DOI: 10.1139/L01-084
Abstract: Stepped spillways have been used for about 3500 years. The last few decades have seen the development of new construction materials, design techniques, and applications, for ex le, embankment overtopping protection systems. Although it is commonly acknowledged that free-surface aeration is significant in stepped chutes, experimental data are scarce, often limited to very steep slopes (α ~ 50°). This paper presents an experimental study conducted in a large-size stepped chute (α = 22°, h = 0.1 m, W = 1 m). Observations demonstrate the existence of a transition flow pattern for intermediate flow rates between nappe and skimming flows. Detailed airwater flow measurements were conducted in both transition and skimming flows, immediately downstream of the inception point of free-surface aeration where uniform equilibrium flow conditions were not achieved. In skimming flows, a complete characterization is developed for the distributions of void fraction, bubble count rate, and velocity, and flow resistance data are compared with other studies. Transition flows exhibit significantly different airwater flow properties. They are highly aerated, requiring the design of comparatively high chute sidewalls.Key words: stepped spillway, air entrainment, two-phase flow properties, skimming flow, transition flow.
The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu river, southwestern China
Publisher: Elsevier BV
Date: 11-2005
On the estimation of free-surface turbulence using ultrasonic sensors
Publisher: Elsevier BV
Date: 04-2018
On turbulence and turbulent events in a breaking bore
Publisher: Elsevier BV
Date: 03-2020
Discussion of Stability of concrete macro-roughness linings for overflow protection of earth embankment dams
Publisher: Canadian Science Publishing
Date: 06-2003
DOI: 10.1139/L03-035
Air bubble entrainment at vertical plunging jets: a large-scale experimental study
Publisher: The University of Queensland, School of Civil Engineering
Date: 07-02-2017
DOI: 10.14264/449440
Convective transport of air bubbles in strong hydraulic jumps
Publisher: Elsevier BV
Date: 10-2010
Discussions: Model Study of a Roller Compacted Concrete Stepped Spillway
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-1997
Discussion of “Flow Characteristics of Skimming Flows in Stepped Channels” by I. Ohtsu, Y. Yasuda, and M. Takahashi
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2006
Current knowledge in hydraulic jumps and related phenomena. A survey of experimental results
Publisher: Elsevier BV
Date: 03-2009
An Experimental Study of Individual Air Bubble Entrainment at a Planar Plunging Jet
Publisher: Elsevier BV
Date: 03-1999
Rapid operation of a tainter gate: The transient flow motion
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.27
Mixing in estuaries
Publisher: Elsevier
Date: 2004
A Time-Domain Analytic Solution of Flow-Induced Undular Bores
Publisher: MDPI AG
Date: 27-05-2022
DOI: 10.3390/JMSE10060738
Abstract: In this study, the problem of surface waves induced by water flow in a flow channel was investigated. The mathematical model based on the potential wave theory was established, and a new analytic solution to the corresponding initial and boundary value problem was proposed. To confirm our analytic solution, the mathematical model was applied to simulate experiments conducted in a flow channel in the laboratory. Using our analytic solution, water surface elevations and flow velocities at certain locations in the channel were compared with experimental results. Comparisons between our analytic solution and experimental results confirmed our theory that litudes and propagating phases are in very close agreement. Our analytic solution can be used to calculate variations in pressure and velocity along the water depth, which are expensive to calibrate and obtain in experiments. Although our analytic solution was established based on linear theory, it is very practical for applications studying the basic properties of surface elevation, velocity, and pressure of the flow field induced by water current both in space and time.
Discussion of “Hydraulic Design of Stepped Spillways” by Robert M. Boes and Willi H. Hager
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2005
Optical flow estimations in aerated spillway flows: Filtering and discussion on sampling parameters
Publisher: Elsevier BV
Date: 05-2019
Tidal Bores
Publisher: Springer Netherlands
Date: 2013
Experimental Study of Turbulent Fluctuations in Hydraulic Jumps
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2015
Turbulence and suspended sediment processes in the Garonne River tidal bore in november 2016
Publisher: Elsevier BV
Date: 10-2019
Air–water and momentum exchanges in unsteady surging waters: An experimental study
Publisher: Elsevier BV
Date: 10-2005
Closure to “Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps”
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2023
Successive impact of tidal bores on sedimentary processes: Arcins channel, Garonne River
Publisher: Elsevier BV
Date: 03-2017
Undular tidal bore dynamics in the Daly Estuary, Northern Australia
Publisher: Elsevier BV
Date: 08-2004
Pressure fluctuations and air-water flow properties in hydraulic jumps
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.34
Turbulence in an inundated urban environment during a major flood: implications in terms of people evacuation and sediment deposition
Publisher: EDP Sciences
Date: 2014
DOI: 10.1051/MECA/2014017
Ventilated Corner Baffles to Assist Upstream Passage of Small-Bodied Fish in Box Culverts
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2018
Preliminary Measurements of Turbulence and Environmental Parameters in a Sub-Tropical Estuary of Eastern Australia
Publisher: Springer Science and Business Media LLC
Date: 12-2005
Step cavity and gabion aeration on a gabion stepped spillway
Publisher: The University of Queensland
Date: 2014
DOI: 10.14264/UQL.2014.37
Bubble convection and bubbly flow turbulent time and length scales in two-dimensional plunging jets
Publisher: Elsevier BV
Date: 11-2018
Upstream propagation of surges and bores: Free-surface observations
Publisher: Informa UK Limited
Date: 03-2017
Similitude of Air Entrainment at Vertical Circular Plunging Jets
Publisher: ASMEDC
Date: 2002
Abstract: Air bubble entrainment at plunging jet takes place when the jet impact velocity exceeds a critical velocity function of the inflow conditions. This study investigates scale effects affecting air entrainment and bubble dispersion at vertical circular plunging jets. Three scale models were used and detailed air-water measurements were performed systematically for identical Froude numbers. The results highlight significant scale effects when We1 & 1E+3 or V1/ur & 10. Bubble chord times were also measured and presented in terms of pseudo-bubble chord length which was found to overestimate real bubble chords by 10 to 30%. The data show pseudo-bubble chord sizes ranging from less than 0.5 mm to more than 10 mm. The average pseudo-chord sizes were between 5 and 7 mm.
Energy dissipation, flow resistance and gas-liquid interfacial area in skimming flows on moderate-slope stepped spillways
Publisher: Springer Science and Business Media LLC
Date: 22-03-2009
Suspended sediment properties and suspended sediment flux estimates in an inundated urban environment during a major flood event
Publisher: American Geophysical Union (AGU)
Date: 11-2012
DOI: 10.1029/2012WR012381
Experimental study of a positive surge. Part 1: basic flow patterns and wave attenuation
Publisher: Springer Science and Business Media LLC
Date: 09-08-2011
Advective diffusion
Publisher: Elsevier
Date: 2004
Towards reliable turbulence estimations with phase-detection probes: an adaptive window cross-correlation technique
Publisher: Springer Science and Business Media LLC
Date: 26-11-2019
Hydraulics of the Developing Flow Region of Stepped Spillways. II: Pressure and Velocity Fields
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2016
Surface waves and roughness in self-aerated supercritical flow
Publisher: Springer Science and Business Media LLC
Date: 08-05-2007
Turbulence characteristics in skimming flows on stepped spillways
Publisher: Canadian Science Publishing
Date: 09-2008
DOI: 10.1139/L08-030
Abstract: The stepped spillway design is characterized by an increase in the rate of energy dissipation on the chute associated with a reduction of the size of the downstream energy dissipation system. This study presents a thorough investigation of the air–water flow properties in skimming flows with a focus on the turbulent characteristics. New measurements were conducted in a large-size facility (θ = 22° step height, h = 0.1 m) with several phase-detection intrusive probes. Correlation analyses were applied to estimate the integral turbulent length and time scales. The skimming flow properties presented some basic characteristics that were qualitatively and quantitatively in agreement with previous air–water flow measurements in skimming flows. Present measurements showed some relatively good correlation between turbulence intensities T u and turbulent length and time scales. These measurements also illustrated large turbulence levels and large turbulent time and length scales in the intermediate region between the spray and bubbly flow regions.
Field Measurements of Unsteady Turbulence in a Tidal Bore: the Garonne River in October 2013
Publisher: Informa UK Limited
Date: 13-04-2015
Scale effects affecting two-phase flow properties in hydraulic jump with small inflow Froude number
Publisher: Elsevier BV
Date: 02-2013
Hydraulics of the Developing Flow Region of Stepped Spillways. I: Physical Modeling and Boundary Layer Development
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2016
Undular tidal bores: effect of channel constriction and bridge piers
Publisher: Springer Science and Business Media LLC
Date: 20-08-2010
Bubbly flow measurements in hydraulic jumps with small inflow Froude numbers
Publisher: Elsevier BV
Date: 07-2011
Introducing a single bubble event detection technique for air-water interfacial velocity measurements in unsteady turbulent bore
Publisher: The University of Queensland
Date: 11-12-2020
DOI: 10.14264/EB69FC1
Acoustic Doppler velocimetry (ADV) in small estuary: Field experience and signal post-processing
Publisher: Elsevier BV
Date: 10-2008
Experimental study of gas-liquid interfacial properties in a stepped cascade flow
Publisher: Springer Science and Business Media LLC
Date: 2002
Baffle Designs to facilitate Fish Passage in Box Culverts: A Preliminary study
Publisher: USU Libraries
Date: 2016
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