ORCID Profile
0000-0002-7516-315X
Current Organisations
University Medical Center Groningen
,
James Cook University
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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)
Interdisciplinary Engineering | Turbulent Flows | Fluidization And Fluid Mechanics | Turbulent Flows | Computational Fluid Dynamics | Fluidisation and Fluid Mechanics | Water And Sanitary Engineering | Computational Heat Transfer | Heat And Mass Transfer Operations |
ANZSRC Socio-Economic Objective (SEO)
Physical sciences | Industry | Industrial Energy Conservation and Efficiency | Water Allocation and Quantification | Residential Energy Conservation and Efficiency | Atmospheric Processes and Dynamics | Land and water management | Commercial Energy Conservation and Efficiency | Expanding Knowledge in the Earth Sciences | Forest and Woodlands Water Management | Coastal and Estuarine Water Management | Farmland, Arable Cropland and Permanent Cropland Water Management
Related Links
Publications
Low-Reynolds-number fountain behaviour
Publisher: Cambridge University Press (CUP)
Date: 11-07-2008
DOI: 10.1017/S0022112008002310
Abstract: Experimental evidence for previously unreported fountain behaviour is presented. It has been found that the first unstable mode of a three-dimensional round fountain is a laminar flapping motion that can grow to a circling or multimodal flapping motion. With increasing Froude and Reynolds numbers, fountain behaviour becomes more disorderly, exhibiting a laminar bobbing motion. The transition between steady behaviour, the initial flapping modes and the laminar bobbing flow can be approximately described by a function FrRe 2/3 = C . The transition to turbulence occurs at Re 120, independent of Froude number, and the flow appears to be fully turbulent at Re ≈2000. For Fr 10 and Re ≲120, sinuous shear-driven instabilities have been observed in the rising fluid column. For Re ≳120 these instabilities cause the fountain to intermittently breakdown into turbulent jet-like flow. For Fr ≲10 buoyancy forces begin to dominate the flow and pulsing behaviour is observed. A regime map of the fountain behaviour for 0.7≲ Fr ≲100 and 15≲ Re ≲1900 is presented and the underlying mechanisms for the observed behaviour are proposed. Movies are available with the online version of the paper.
Height and stability of laminar plane fountains in a homogeneous fluid
Publisher: Elsevier BV
Date: 09-2008
Interaction behavior of triple transitional round fountains in a homogeneous fluid
Publisher: Elsevier BV
Date: 12-2016
Genetic variants in RBFOX3 are associated with sleep latency
Publisher: Springer Science and Business Media LLC
Date: 04-05-2016
DOI: 10.1038/EJHG.2016.31
Natural convection in a cavity with time-varying thermal forcing on a sidewall
Publisher: Elsevier BV
Date: 04-2020
Transition behaviour of weak turbulent fountains
Publisher: Cambridge University Press (CUP)
Date: 11-05-2010
DOI: 10.1017/S002211201000087X
Abstract: Numerical simulations of fully turbulent weak fountain flow are used to provide direct evidence for the scaling behaviour of fountain flow over the Froude number range Fr = 0.1–2.1 and Reynolds number range Re = 20–3494. For very weak flow at Fr 0.4, the flow mean penetration height, Z m , scales with Z m / R 0 = A 1 Fr 2/3 + A 2 Fr 2/3 where R 0 is the source radius. A 1 and A 2 are constants which quantify the separate effects of the radial acceleration of fountain fluid from the source ( A 1 ) and the backpressure from the surrounding intrusion, if present, on the upflow ( A 2 ). The evidence presented in this work suggests that the mechanisms for the two parts in the scaling of Z m scale with Fr 2/3 . The intrusion behaviour varies with the Reynolds number ( Re ) but there is no Re affect on the fountain penetration height. For Re 250 the radial intrusion flow is subcritical and has different behaviour. For Fr between 0.4 and 2.1 the effect of source momentum flux increases and the flow structure changes to one where there is a coherent upflow and a cap region where the flow stagnates and then reverses. The two regions have separate scaling behaviour such that the overall height, through this transition range of Froude numbers, can be described by Z m / R = C 1 Fr 2/3 + C 2 Fr 2 , where C 1 and C 2 are constants. Over this transition range the effect of source velocity profile is more significant than the Reynolds number effects and the effect of inlet turbulence is minor.
Prandtl number scaling of unsteady natural convection boundary layers forPr >
Publisher:
American Physical Society (APS)
Date:
24-06-2009
Publisher: American Physical Society (APS)
Date: 24-06-2009
A Comparative Study of the Thermal Performances of Cross-Corrugated and V-Groove Solar Air Collectors
Publisher: Informa UK Limited
Date: 31-07-2007
Direct numerical simulation of “fountain filling box” flow with a confined weak laminar plane fountain
Publisher: Wiley
Date: 07-09-2023
DOI: 10.1002/HTJ.22691
Abstract: A “fountain filling box” flow produced by discharging a weak laminar plane fountain in a confined open channel is studied numerically. Two‐dimensional direct numerical simulations were performed for weak plane fountains. The development of the fountain flow experiences five stages the initial upflow and the subsequent downflow after the fountain penetrates to the maximum height, followed by the outward movement of the intrusion of the fallen fountain fluid on the channel bottom, and then the wall fountain formed by the impingement of the intrusion on the vertical sidewall, which results in the reversed flow, and finally the gradual stratification of the fluid. The behavior of the intrusion can be approximately described with the plane gravity current theory. The period for the intrusion to reach the bounded side wall increases with increasing Re or decreasing Fr . Three regimes are found for the wall fountain behavior “no‐falling,” “slumping down,” and “rolling down” behavior. Convection, mixing, conduction, and filling all contribute to the formation and development of stratification, but their effects vary at different stages. For the initial stages, convection and mixing play a key role, resulting in an increasing bulk entrainment rate, while conduction and filling are dominant after quasi‐steady stratification is created, presenting a decreasing bulk entrainment rate.
Ratios of global radiation on a tilted to horizontal surface for Yunnan Province, China
Publisher: Elsevier BV
Date: 08-1995
Scalings for unsteady natural convection boundary layers on a vertical plate at time-dependent temperature
Publisher: Elsevier BV
Date: 2017
Optimum inclinations of south-facing solar collectors during the heating season in China
Publisher: Elsevier BV
Date: 03-1989
GWAS for executive function and processing speed suggests involvement of the CADM2 gene
Publisher: Springer Science and Business Media LLC
Date: 14-04-2015
DOI: 10.1038/MP.2015.37
Optimum inclinations for the entire year of south-facing solar collectors in China
Publisher: Elsevier BV
Date: 12-1989
Unsteady natural convection boundary-layer flow along a vertical isothermal plate in a linearly stratified fluid with Pr>1
Publisher: Elsevier BV
Date: 2002
Linear temporal stability analysis on the inviscid sheared convective boundary layer flow
Publisher: AIP Publishing
Date: 11-2022
DOI: 10.1063/5.0123044
Abstract: A linear temporal stability analysis is conducted for inviscid sheared convective boundary layer flow, in which the sheared instability with stable stratification coexists with and caps over the thermal instability with unstable stratification. The classic Taylor–Goldstein equation is applied with different stratification factors Js and Jb in the Brunt–Väisälä frequency, respectively. Two shear-thermal hybrid instabilities, the hybrid shear stratified (HSS) and hybrid Rayleigh–Bénard (HRB) modes, are obtained by solving the eigenvalue problems. It is found that the temporal growth rates of the HSS and HRB modes vary differently with increased Jb in two distinct wavenumber (α̃) regions defined by the intersection point between the stability boundaries of the HSS and HRB modes. Based on Jb,cr where the temporal growth rate of the HSS and HRB are equal, a map of the unique critical boundary, which separates the effective regions of the HSS and HRB modes, is constructed and found to be dependent on Js, Jb, and α̃. The examinations of the subordinate eigenfunctions indicate that the shear instability is well developed in the HSS mode, in which the large vortex structures may prevail and suppress the formation of convective rolls the shear instability in the HRB mode is either “partly developed” when Jb& Jb,cr or “undeveloped” when Jb& Jb,cr, thus only plays a secondary role to modify the dominant convective rolls, and as Jb increases, the eigenfunctions of the HSS mode exhibit different transitional behaviors in the two regions, signifying the “shear enhancement” and “shear sheltering” of the entrainment of buoyancy flux.
Simplified determination of annual and seasonal total extraterrestrial radiation incident on a horizontal surface
Publisher: Elsevier BV
Date: 12-1990
Linear temporal stability analysis on cross sheared flow: The stabilization effects via cross shear
Publisher: AIP Publishing
Date: 03-2022
DOI: 10.1063/5.0083687
Abstract: The stability features of the inviscid, homogenous, and free cross sheared flow, with base flow velocities U=tanh(z) in the primary direction, which is unstable, and V=ξz3 in the orthogonal direction, which is stable, are thoroughly examined with linear temporal stability analysis, where z is the transverse coordinate perpendicular to the flow and ξ is the cross shear ratio which is the ratio of the characteristic magnitudes of V to U. The map of the unstable regions directly related to χ=ξ(β/α) is obtained, where (β/α) is the ratio between the orthogonal and primary wavenumbers. Further examination of the eigenfunctions shows that the eigenfunction structures ide into the orthogonal wavenumber (OW) mode where (β/α) dominates and the cross shear (CS) mode where ξ dominates. The cross shear is found necessary for stabilization in spite of different fashions for the OW and CS modes. The transition from the OW mode to the CS mode shows that the developments of the two modes inherently compete with each other, so that when ψ=(β/α)/ξ decreases the enhanced cross shear needs to deteriorate the OW mode before it helps the growth of the CS mode. Based on the magnitudes of the associated eigenfunctions in the enstrophy budget, the map of the OW, CS, and hybrid modes, which includes the mixed features of both the OW and CS modes, is produced and discussed.
Thermal performance of dynamic, origami‐inspired geometries: An experimental study
Publisher: Wiley
Date: 24-03-2023
DOI: 10.1002/HTJ.22852
Abstract: Origami has become an increasingly popular geometry in thermal engineering, namely, heat regulatory applications such as heat sinks and radiators. In this study, the radiative heating and radiative and natural convective cooling of three origami geometries (W‐fold, Miura Ori (1), and Miura Ori (2)) made of heavy‐duty aluminum foil under a radiative heater with different powers (800, 1600, and 2400 W) and different compression lengths (0.15, 0.25, 0.35, and 0.45 m) were investigated. It was found that the Miura Ori (1) and Miura Ori (2) geometries have three to four times high‐temperature differences (the maximum temperature at the end of the heating process minus the initial temperature) than the W‐fold geometry. The Miura Ori (2) and Miura Ori (1) geometries produced high heat capacity enhancements of 1.2–3.2 times at high compression lengths that showed great potential for applications such as solar steam generators. The overall heat transfer coefficient for cooling can be controlled by changing the compression length of the origami geometry, allowing for dynamic surface temperature controls. This parameter decreases by up to 25.3%, 22.6%, and 45.9% for W‐fold, Miura Ori (1), and Miura Ori (2), respectively, in comparison to their flat states.
Effects of meander curvature in thermally stratified turbulent open-channel flow
Publisher: AIP Publishing
Date: 09-2022
DOI: 10.1063/5.0106526
Abstract: Thermal stratification can lead to the d ing of turbulence, which reduces the mixing of solutes in a fluid body. A series of direct numerical simulation (DNS) solutions sweeping through a range of four different meandering channel curvatures, from a sharp to mild curvature range, are obtained to investigate the effect of curvature on stratification in meandering thermally stratified turbulent open channel flow with an internal heat source that models radiative heating from above. Based on the DNS results, the present paper addresses two issues. First, the influence of changing curvature on the complex bi-cellular pattern of the secondary flow is investigated, including the distribution of the temperature field. Second, the effects of changing curvature on the degree of stratification are analyzed. Stratification can be characterized by the friction Richardson number Riτ and the bulk Richardson number Rib. Stratification can also be viewed in terms of the transfer of energy from mean flow kinetic energy to potential energy via buoyancy fluxes. We study the effect of curvature on stratification by investigating its effect on the friction and bulk Richardson numbers. We also study the transfers between the global potential and kinetic energy reservoirs, including the global available Ea, background Eb, and total potential energy Ep, and the domain-averaged mean kinetic and turbulent kinetic energy. It is found that, in meandering channels, with the increase in curvature, Ep increases and Riτ and Rib decrease, indicating that increasing curvature leads to a decrease in the level of stratification. On the other hand, we also find that a low curvature meandering channel has a higher level of stratification than a straight channel.
The impact of power of the auxiliary electric heater in the storage tank on the performance of a thermosyphon solar water system with an auxiliary electric heater (TSAEH)
Publisher: Elsevier BV
Date: 12-1995
A parametric study on the thermal performance of cross-corrugated solar air collectors
Publisher: Elsevier BV
Date: 07-2006
Unsteady natural convection on an evenly heated vertical plate for Prandtl numberPr <
Publisher:
American Physical Society (APS)
Date:
21-12-2005
Publisher: American Physical Society (APS)
Date: 21-12-2005
Direct simulation of weak laminar plane fountains in a homogeneous fluid
Publisher: Elsevier BV
Date: 09-2000
Distribution patterns of diffuse solar radiation in Yunnan Province, China
Publisher: Elsevier BV
Date: 05-1996
BIFURCATION OF NATURAL CONVECTION FLOW IN AN INCLINED DIFFERENTIALLY HEATED CLOSED SQUARE CAVITY
Publisher: Begell House
Date: 2015
The Reynolds and Prandtl number dependence of weak fountains
Publisher: Springer Science and Business Media LLC
Date: 07-2003
Scaling investigation of the natural convection boundary layer on an evenly heated plate
Publisher: Elsevier BV
Date: 04-2007
Turbulence structure in a very sharp thermally stratified open-channel meander
Publisher: AIP Publishing
Date: 03-2022
DOI: 10.1063/5.0083230
Abstract: Direct numerical simulation (DNS) results for turbulent open-channel flow through an idealized sine-generated meander with and without an internal heat source that models radiative heating from above are used to analyze the effect of a very sharp meander configuration and thermal stratification on the turbulence structure in the channel with friction Reynolds number Reτ=200. Spatial distributions of temperature, mean velocities, vorticity, mean-flow kinetic energy, and turbulent kinetic energy (TKE) are presented. In both cases, the cross-sectional motion is characterized by three circulation cells: a center-region cell and two weaker outer bank and inner bank cells. However, there is also a small cell observed near the corner of the channel bed inner bank at the channel outlet and the channel bed outer bank at the channel inlet. The tri-cellular cross-stream motions control the distributions of temperature and kinetic energy. In the stratified case, two separated shear layers (SSLs) are found: the first one is formed before the bend apex, and the second one is observed in the wake after the bend apex. In the neutral case, only the first SSL is observed. Turbulent lification can be seen in both cases however, in the stratified case, the second SSL stretches out to the channel outlet and is introduced back to the channel inlet by an anti-symmetric periodic boundary condition and then follows the outer bank line. The two SSLs converge in the region before the bend apex and lify the turbulence more strongly there than in the neutral case. The turbulence kinetic energy budget terms for the stratified case are analyzed to determine the characteristics of production, dissipation and transport of TKE in thermally stratified meandering flow.
Analysis of Effects of Meander Curvature in Thermally Stratified Turbulent Open-channel Flow
Publisher: Wiley
Date: 15-10-2021
Weak fountains in a stratified fluid
Publisher: American Physical Society (APS)
Date: 26-12-2002
Characteristics of unsteadiness for transitional plane fountains in linearly stratified fluids
Publisher: Elsevier BV
Date: 2019
Behavior of the interaction between twin transitional round fountains in a homogeneous fluid, Part 1: Experimental study
Publisher: Elsevier BV
Date: 07-2015
Three-Dimensional Direct Numerical Simulation of Unsteady Transitional Round Fountains in a Homogeneous Fluid
Publisher: Trans Tech Publications, Ltd.
Date: 05-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.553.150
Abstract: Fountains are common both in nature and in industrial and environmental settings. These are jet flows with a negative buoyancy force acting in the direction opposite to the jet direction. The onset of asymmetry and unsteadiness, which occurs in transitional fountains with intermediate Reynolds ( Re ) and Froude ( Fr ) numbers, is the key to shed light on the turbulence generation mechanism in fountains. In this study, a series of three-dimensional direct numerical simulations are carried out for transitional round fountains with Re and Fr in the ranges of 1 ≤ Fr ≤ 8, 50 ≤ Re ≤ 500 to reveal their unsteady flow dynamics, in particular the onset of asymmetry, three-dimensionality, and unsteadiness. The numerical results show that the onset of asymmetry and unsteadiness can be detected and quantified by the tangent velocity on the interfacial surface between the fountain fluid and the ambient fluid. The results also demonstrate that a critical Re is at about 165 for Fr =2 fountains and is reduced to about 65 for Fr =3 fountains. Similarly, a critical Fr exists between 2 and 3 for the Re = 100 fountains, whereas for Re = 200 fountains it reduces to be between 1.8 and 2.
Behavior of the interaction between twin transitional round fountains in a homogeneous fluid, Part 2: Numerical study
Publisher: Elsevier BV
Date: 07-2015
Correlations to estimate monthly total solar radiation on horizontal surfaces at Kunming, China
Publisher: Elsevier BV
Date: 03-2000
Field Survey and Analysis of Student Flat Indoor Thermal Environment in Winter
Publisher: IEEE
Date: 2009
Micromechanism of heat storage in a binary system of two kinds of polyalcohols as a solid–solid phase change material
Publisher: Elsevier BV
Date: 2000
Experimental investigation of static pressure characteristics in a slotted short pin array
Publisher: Informa UK Limited
Date: 06-04-2023
The Operational Thermal Performance of a Simple Passive Solar House in Winter: A Case Study in Kunming, China
Publisher: Informa UK Limited
Date: 03-07-2013
Forced turbulent fountain flow behaviour
Publisher: Cambridge University Press (CUP)
Date: 08-02-2011
DOI: 10.1017/S0022112010005872
Abstract: Numerical simulations of turbulent fountain flow are used to investigate the important energy and mass transfer mechanisms present in the forced fountain flow regime, which has been reported to exist at Froude numbers ( Fr ) greater than 3. The flow is equivalent to a negatively buoyant jet with three flow streams, the inner upflow (IF), the outer downflow (OF) and the surrounding ambient fluid (AF). Simulation results are presented for Fr = 4 and 7 at Reynolds number Re = 3350. The mean fountain penetration height scales with the previously reported relation Z m / R 0 = 2.46 Fr , where R 0 is the source radius, but the assumptions behind analytical derivations of the relation are not supported by the present results. The results suggest that the OF may be relatively well described by the dynamics of a pure line plume surrounding the IF but with higher entrainment owing to the unsteady pulsing behaviour of the flow entering the OF from the IF. The length scale for a pure plume appears to apply at Fr = 7 in the OF and a degree of self-similarity exists. Comparisons with previous results suggest the IF is not fully developed at Fr = 7 and entrainment into the IF from the OF may not occur until Fr 15.
Thermal Entrainment in the Core Regions of Transitional Plane Fountains in Linearly Stratified Ambient Fluids
Publisher: World Scientific Pub Co Pte Ltd
Date: 04-2022
DOI: 10.1142/S175882512250020X
Abstract: Thermal entrainment is an integral feature of free-shear flows involving temperature changes, including fountains (negatively buoyant jets). The understanding of thermal entrainment is essential for applications involving thermal stratification such as that in a solar water storage tank. In this study, thermal entrainment in the core regions of transitional plane fountains in linearly-stratified ambient fluids is studied numerically over a range of the Froude number, Reynolds number, and dimensionless thermal stratification parameter. The results show that thermal entrainment has a negligible effect on the inner core region, but is significant in the outer core region, particularly at the interfaces among the upflow, downflow, and ambient fluid, and the thermal entrainment parameter, which quantifies the extent of thermal entrainment, decreases with height or in a stronger stratification, but increases with increasing Froude number or Reynolds number. Several numerical relations are obtained with the numerical results for the thermal entrainment parameter.
Scaling laws for natural convection boundary layer of a Pr > 1 fluid on a vertical solid surface subject to a sinusoidal heating flux in a linearly stratified ambient
Publisher: Wiley
Date: 21-12-2022
DOI: 10.1002/HTJ.22431
Abstract: The understanding of the transient behavior of the natural convection boundary layer on a heated vertical solid surface is crucial for numerous applications. In this study, scaling analysis is performed to derive the scaling laws for the major parameters that characterize the transient behavior of natural convection boundary layer of a Prandtl number larger than 1 fluid on a vertical solid surface subject to a sinusoidal heating flux in a linearly stratified ambient. It is found that the developed scaling laws are in good agreement with the direct numerical simulation results over wide ranges of Prandtl number, stratification parameter, and frequency of the sinusoidal heat flux.
Direct numerical simulation of transient performance in a rectangular closure with a non-staggered mesh scheme
Publisher: Elsevier BV
Date: 09-1998
GWAS of 126,559 individuals identifies genetic variants associated with educational attainment
Publisher: American Association for the Advancement of Science (AAAS)
Date: 21-06-2013
Abstract: Many genomic elements in humans are associated with behavior, including educational attainment. In a genome-wide association study including more than 100,000 s les, Rietveld et al. (p. 1467 , published online 30 May see the Perspective by Flint and Munafò ) looked for genes related to educational attainment in Caucasians. Small genetic effects at three loci appeared to impact educational attainment.
Cooling of aPr<1 fluid in a rectangular container
Publisher: Cambridge University Press (CUP)
Date: 15-02-2007
DOI: 10.1017/S0022112006003703
Abstract: The flow behaviour associated with the cooling of an initially quiescent isothermal Newtonian fluid with Prandtl number Pr less than unity in a rectangular container by unsteady natural convection with an imposed lower temperature on vertical sidewalls is investigated by scaling analysis and direct numerical simulation. The flow is dominated by two distinct stages of development. i.e the boundary-layer development stage adjacent to the sidewall and the subsequent cooling-down stage. The first stage can be further ided into a start-up stage, transitional stage, and steady-state stage. The parameters characterizing the flow behaviour are the boundary-layer thickness, the maximum vertical velocity within the boundary layer, the time for the boundary layer to reach the steady state, the Nusselt number across the sidewall at the boundary-layer development stage, the time for the fluid in the container to be fully cooled down, and the average fluid temperature over the whole volume of the container.
Alternative Internal Configurations for Enhancing Heat Transfer in Telecommunication Cabinets
Publisher: MDPI AG
Date: 18-04-2023
DOI: 10.3390/EN16083505
Abstract: Telecommunication systems have become a critical part of society which enables connectivity to many essential and trivial services. Consequently, telecommunication equipment is housed in cabinets to protect the electronics from a variety of hazards one of which is temperature-related failure. Current practices use a notable amount of power for the thermal management of telecommunication cabinets which can be reduced by considering alternative methods of cooling. In this paper, experiments were carried out to investigate the effectiveness of different internal mounting configurations of electronic components on the thermal performance of a telecommunication cabinet. The investigation tested inclinations (0–90°), different staggered offsets (0–50 mm), changing stream-wise spacing (29–108 mm), and fan speed (with a Reynolds number in the range of 1604 to 5539). The experimental study revealed that heat transfer was enhanced by 9.99% by altering component inclination to 90°, 25.90% by increasing stream-wise spacing from 29 mm to 108 mm, and 36.02% by increasing the Reynolds number from 1604 to 5539. However, the staggered arrangement of internal components decreased Nu by 3.26% for the natural convection condition but increased by 5.69% for the forced convection condition over the tested range and increasing the centre offset of the staggered components with respect to the cabinet did not influence Nu in any significant manner. Natural convection and forced convection also had notable influence on the heat transfer rate. Hence it was seen that alternative internal configurations positively influence heat transfer in telecommunication cabinets for the cases studied.
Numerical simulation of three-dimensional flow dynamics in a hot water storage tank
Publisher: Elsevier BV
Date: 12-2009
Estimation and distribution patterns of direct solar radiation in Yunnan Province, China
Publisher: Elsevier BV
Date: 05-1996
Genetic studies of body mass index yield new insights for obesity biology
Publisher: Springer Science and Business Media LLC
Date: 11-02-2015
DOI: 10.1038/NATURE14177
Common genetic variants associated with cognitive performance identified using the proxy-phenotype method.
Publisher: Proceedings of the National Academy of Sciences
Date: 08-09-2014
Abstract: We identify several common genetic variants associated with cognitive performance using a two-stage approach: we conduct a genome-wide association study of educational attainment to generate a set of candidates, and then we estimate the association of these variants with cognitive performance. In older Americans, we find that these variants are jointly associated with cognitive health. Bioinformatics analyses implicate a set of genes that is associated with a particular neurotransmitter pathway involved in synaptic plasticity, the main cellular mechanism for learning and memory. In addition to the substantive contribution, this work also serves to show a proxy-phenotype approach to discovering common genetic variants that is likely to be useful for many phenotypes of interest to social scientists (such as personality traits).
The solar water heating system with natural circulation assisted by an auxiliary electric heater—performance modeling
Publisher: Elsevier BV
Date: 1991
A Review of Gravitational Water Vortex Hydro Turbine Systems for Hydropower Generation
Publisher: MDPI AG
Date: 15-07-2023
DOI: 10.3390/EN16145394
Abstract: Hydropower is one of the most sustainable and desirable renewable energy sources. Gravitational water vortex hydro turbine (GWVHT) systems are one of the most suitable and sustainable renewable power generation devices for remote and rural areas, particularly in developing countries, owing to their small scales and low costs. There are various GWVHT systems with different configurations and various operating conditions. The main components of a GWVHT system include the inlet and outlet channels, a basin, and a turbine on which there are a number of blades attached. This paper presents a comprehensive review regarding the progress and development of various GWVHT systems, covering broad aspects of GWVHT systems, particularly various types of basins, inlet and outlet channels, turbines with blades which have different shapes, orientations, sizes, numbers, etc. The nature of the previous studies is summarised. The fundamentals of the vortex dynamics involved and the quantitative analysis of the performance of GWVHT systems are also described. The turbulence models and multiphase models used in some leading numerical simulation studies have been reviewed. As a case study, the implementation of a GWVHT system in PNG is presented. Based on the review of previous studies regarding GWVHT systems, the major issues and challenges are summarised, and some key topics are recommended for future research work on the performance of GWVHT systems.
Correlations for maximum penetration heights of transitional plane fountains in linearly stratified fluids
Publisher: Elsevier BV
Date: 10-2016
Parametric studies and evaluations of indoor thermal environment in wet season using a field survey and PMV–PPD method
Publisher: Elsevier BV
Date: 06-2010
Defining the role of common variation in the genomic and biological architecture of adult human height
Publisher: Springer Science and Business Media LLC
Date: 05-10-2014
DOI: 10.1038/NG.3097
Hydrodynamic interaction of two neutrally-buoyant smooth spheres suspended in plane Poiseuille flow: the BEM simulations versus the MoR approximations
Publisher: Springer Science and Business Media LLC
Date: 14-04-2005
Asymmetry and penetration of transitional plane fountains in stratified fluid
Publisher: Elsevier BV
Date: 11-2015
Heat storage performance of the binary systems neopentyl glycol/pentaerythritol and neopentyl glycol/trihydroxy methyl-aminomethane as solid–solid phase change materials
Publisher: Elsevier BV
Date: 2000
Effect of Thermal Stratification in Meandering Turbulent Open-Channel Flow with Varying Sinuosity
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2023
Numerical Study on Mixing Characteristics of hot Water inside the Storage Tank of a Solar System with Different Inlet Velocities of the Supply Cold Water
Publisher: Elsevier BV
Date: 2011
Impinging plane fountains in a homogeneous fluid
Publisher: Elsevier BV
Date: 05-2009
Natural convection cooling of rectangular and cylindrical containers
Publisher: Elsevier BV
Date: 02-2001
Performance Analysis on Solar Cell Modules of Flat-Plate and Trough Concentrating Photovoltaic System
Publisher: Shanghai Institute of Optics and Fine Mechanics
Date: 2009
A Parametric Study on the Thermal Performance of Unglazed Solar Water Collectors with Their Colorbond Steel Absorber Plates Also Used as Roofs
Publisher: Informa UK Limited
Date: 10-02-2014
Scalings for unsteady natural convection boundary layers on an evenly heated plate with time-dependent heating flux
Publisher: American Physical Society (APS)
Date: 18-12-2013
Natural convection boundary-layer flow on an evenly heated vertical plate with time-varying heating flux in a stratified Pr < 1 fluid
Publisher: Informa UK Limited
Date: 19-07-2019
Linear temporal stability analysis on non-parallel free cross sheared flow with a primary hyperbolic velocity and an orthogonal Bickley jet velocity
Publisher: AIP Publishing
Date: 12-2021
DOI: 10.1063/5.0070695
Abstract: A linear temporal stability analysis is carried out on non-parallel free cross sheared flow consisting of the unstable hyperbolic velocity U=tanh(z) in the primary direction and the comparable unstable Bickley jet velocity V=sech2(z) in the orthogonal direction, where z is the coordinate perpendicular to the plane of the primary and orthogonal directions. The cross sheared flow involves the non-parallel effects such as twisted flow and cross flow. The linearized perturbation equations are derived which are subsequently used to examine the stability features. It is found that the instability associated with U=tanh(z) and V=sech2(z) transitions asymptotically to each other as the combined factor χ=ξ(β/α) varies, where ξ=||V||/||U|| is the cross shear ratio and β/α is the ratio between the orthogonal and primary wavenumbers with || || representing the characteristic magnitudes of the velocity components. In addition to the hyperbolic flow (HF) mode and the Bickley jet flow (BJF) mode associated with U=tanh(z) and V=sech2(z), respectively, the orthogonal wavenumber (OW) mode where β/α dominates and the cross shear (CS) mode where ξ dominates are found in the eigenfunction structures. The physical mechanisms of the four eigenfunctions modes are examined with the kinetic energy and enstrophy budgets. The map of the unstable regions influenced and dominated by the OW, CS, HF, and BJF eigenfunction modes is also obtained and discussed.
Long-term behavior of cooling fluid in a vertical cylinder
Publisher: Elsevier BV
Date: 2005
Natural convection stratification and scaling in a cavity with unsteady sidewall heating
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5046230
Indoor thermal environment evaluations and parametric analyses in naturally ventilated buildings in dry season using a field survey and PMVe-PPDe model
Publisher: Elsevier BV
Date: 06-2011
A model for thermosyphon solar water heaters assisted by auxiliary electric heaters
Publisher: Elsevier BV
Date: 09-1990
Comparison of semi-implicit and explicit finite difference algorithms on highly parallel processing architectures
Publisher: Trans Tech Publications, Ltd.
Date: 05-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.553.193
Abstract: Modern GPUs (graphical processing units) are a common source of processing power inmany supercomputers. Their performance derives from the highly parallel architecture that is em-ployed and have the benefit of low cost, temperature and power consumption. Two finite differencemodels have been implemented on GPU, a semi-implicit and an explicit algorithm, to numericallymodel a stratified shear layer, that needs fine meshes to be modelled accurately. The GPU modelswere shown to improve performance by factors of around 50x and 20x for the semi-implicit and ex-plicit models respectively.
Behaviour of laminar plane fountains with a parabolic inlet velocity profile in a homogeneous fluid
Publisher: Elsevier BV
Date: 05-2013
Line fountain behavior at low-Reynolds number
Publisher: Elsevier BV
Date: 04-2010
Scaling laws for unsteady natural convection cooling of fluid with Prandtl number less than one in a vertical cylinder
Publisher: American Physical Society (APS)
Date: 18-07-2005
Transition to asymmetry of transitional round fountains in a linearly stratified fluid
Publisher: Elsevier BV
Date: 07-2017
Scalings for unsteady natural convection boundary layer under time-varying heating flux in a small Prandtl number fluid
Publisher: Elsevier BV
Date: 10-2021
Onset of entrainment in transitional round fountains
Publisher: Elsevier BV
Date: 10-2008
Unified Prandtl number scaling for start-up and fully developed natural-convection boundary layers for both Pr
Publisher:
American Physical Society (APS)
Date:
14-12-2012
Publisher: American Physical Society (APS)
Date: 14-12-2012
Unsteady natural convection boundary-layer flow of a linearly-stratified fluid with on an evenly heated semi-infinite vertical plate
Publisher: Elsevier BV
Date: 2008
A general correlation for estimating the monthly average daily direct radiation incident on a horizontal surface in Yunnan Province, China
Publisher: Elsevier BV
Date: 1988
Annual and seasonal global solar radiation climates in Yunnan, China
Publisher: Elsevier BV
Date: 11-1992
Numerical study on natural convection inside the channel between the flat-plate cover and sine-wave absorber of a cross-corrugated solar air heater
Publisher: Elsevier BV
Date: 2000
Laminar plane fountains impinging on a ceiling with an opposing heat flux
Publisher: Elsevier BV
Date: 09-2009
Correlations between monthly average global solar radiation on horizontal surfaces and relative duration of sunshine in Yunnan Province, China
Publisher: Elsevier BV
Date: 03-1998
Penetration height of transitional round fountains in a linearly stratified fluid
Publisher: Elsevier BV
Date: 02-2017
Intraoperative MET-receptor targeted fluorescent imaging and spectroscopy for lymph node detection in papillary thyroid cancer: novel diagnostic tools for more selective central lymph node compartment
Publisher: Springer Science and Business Media LLC
Date: 07-04-2022
DOI: 10.1007/S00259-022-05763-3
Abstract: Patients undergoing prophylactic central compartment dissection (PCLND) for papillary thyroid cancer (PTC) are often overtreated. This study aimed to determine if molecular fluorescence-guided imaging (MFGI) and spectroscopy can be useful for detecting PTC nodal metastases (NM) and to identify negative central compartments intraoperatively. We used a data-driven prioritization strategy based on transcriptomic profiles of 97 primary PTCs and 80 normal thyroid tissues (NTT) to identify tumor-specific antigens for a clinically available near-infrared fluorescent tracer. Protein expression of the top prioritized antigen was immunohistochemically validated with a tissue microarray containing primary PTC ( n = 741) and NTT ( n = 108). Staining intensity was correlated with 10-year locoregional recurrence-free survival (LRFS). A phase 1 study (NCT03470259) with EMI-137, targeting MET, was conducted to evaluate safety, optimal dosage for detecting PTC NM with MFGI, feasibility of NM detection with quantitative fiber-optic spectroscopy, and selective binding of EMI-137 for MET. MET was selected as the most promising antigen. A worse LRFS was observed in patients with positive versus negative MET staining (81.9% versus 93.2% p = 0.02). In 19 patients, no adverse events related to EMI-137 occurred. 0.13 mg/kg EMI-137 was selected as optimal dosage for differentiating NM from normal lymph nodes using MFGI ( p 0.0001) and spectroscopy ( p 0.0001). MFGI identified 5/19 levels (26.3%) without NM. EMI-137 binds selectively to MET. MET is overexpressed in PTC and associated with increased locoregional recurrence rates. Perioperative administration of EMI-137 is safe and facilitates NM detection using MFGI and spectroscopy, potentially reducing the number of negative PCLNDs with more than 25%. NCT03470259.
Conjugate natural convection heat transfer in a partitioned differentially-heated square cavity
Publisher: Elsevier BV
Date: 02-2017
Co-operative financial institutions and local development in China
Publisher: Elsevier BV
Date: 06-2015
Stability and Nusselt number scaling for inclined differentially heated cavity flow
Publisher: Elsevier BV
Date: 06-2016
Prandtl number scalings for unsteady natural convection boundary-layer flow on an evenly heated vertical plate in a homogeneous Pr > 1 fluid
Publisher: Informa UK Limited
Date: 21-01-2020
An Experimental Study on the Heat Storage Performances of Polyalcohols NPG, TAM, PE, and AMPD and their Mixtures as Solid-Solid Phase-Change Materials for Solar Energy Applications
Publisher: Informa UK Limited
Date: 15-05-2007
Scaling for unsteady thermo-magnetic convection boundary layer of paramagnetic fluids of Pr > 1 in micro-gravity conditions
Publisher: Elsevier BV
Date: 12-2009
A Parametric Study on the Thermal Performance of a Solar Air Collector with a V-Groove Absorber
Publisher: Informa UK Limited
Date: 15-11-2007
Analytical and experimental studies on the thermal performance of cross-corrugated and flat-plate solar air heaters
Publisher: Elsevier BV
Date: 04-2007
Direct numerical simulation of confined weak round fountains in homogeneous ambient
Publisher: Elsevier BV
Date: 12-2021
Scaling of unsteady natural convection boundary layers with a non-instantaneous initiation
Publisher: Elsevier BV
Date: 10-2009
Performance analysis of solar cell arrays in concentrating light intensity
Publisher: IOP Publishing
Date: 08-2009
Experimental study of flow visualisation using fluorescent dye
Publisher: Elsevier BV
Date: 10-2022
New genetic loci link adipose and insulin biology to body fat distribution
Publisher: Springer Science and Business Media LLC
Date: 11-02-2015
DOI: 10.1038/NATURE14132
Parameteric studies of thermosyphon solar water systems with electric heaters
Publisher: Elsevier BV
Date: 04-1992
Optimum inclinations of south-facing solar collectors during the cooling season in China
Publisher: Elsevier BV
Date: 11-1989
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