ORCID Profile
0000-0002-7051-9137
Current Organisation
University of Adelaide
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Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 09-2018
Publisher: MDPI AG
Date: 12-05-2019
DOI: 10.3390/SU11092694
Abstract: Universities are both disseminators and producers of the climate knowledge needed to institute the social and cultural change required for climate adaptation and mitigation to occur. They also have the opportunity to lead and model pro-environmental behavior, yet often have large carbon budgets, partly caused by staff travel. This paper explores this topic via an institutional case study of what factors motivate the academic community to undertake plane travel and the implications this has for wielding wider societal influence in terms of pro-environmental behavior. We report on a year-long qualitative social science study of academic plane travel at the University of Adelaide, South Australia where we investigated the tension between academic requirements to travel and the institution’s formal commitment to sustainability within the C us Sustainability Plan. We found that, while many academics were worried about climate change, very few were willing to change their current practice and travel less because they are not institutionally incentivized to do so. There is a fear of not flying: plane travel is perceived as a key driver for career progression and this is an ongoing barrier to pro-environmental behavior. We conclude that institutional and political change will be required for in idual change to occur and sustainable agendas to be met within academic communities.
Publisher: American Chemical Society (ACS)
Date: 12-12-2017
Publisher: Elsevier BV
Date: 08-2016
Publisher: SAGE Publications
Date: 06-2017
Publisher: Elsevier BV
Date: 02-2021
Publisher: IEEE
Date: 10-2017
Publisher: ASME International
Date: 13-11-2018
DOI: 10.1115/1.4041523
Abstract: This article describes a direct comparison between two symmetrical airfoils undergoing dynamic stall at high, unsteady reduced frequencies under otherwise identical conditions. Particle image velocimetry (PIV) was performed to distinguish the differences in flow structure between a NACA 0021 and a NACA 0012 airfoil undergoing dynamic stall. In addition, surface pressure measurements were performed to evaluate aerodynamic load and investigate the effect of laminar separation bubbles and vortex structures on the pressure fields surrounding the airfoils. Airfoil geometry is shown to have a significant effect on flow structure development and boundary layer separation, with separation occurring earlier for thinner airfoil sections undergoing constant pitch-rate motion. Inertial forces were identified to have a considerable impact on the overall force generation with increasing rotation rate. Force oscillation was observed to correlate with multiple vortex structures shedding at the trailing-edge during high rotation rates. The presence of laminar separation bubbles on the upper and lower surfaces was shown to dramatically influence the steady-state lift of both airfoils. Poststall characteristics are shown to be independent of airfoil geometry such that periodic vortex shedding was observed for all cases. However, the onset of deep stall is delayed with increased nondimensional pitch rate due to the delay in initial dynamic-stall vortex.
Publisher: American Chemical Society (ACS)
Date: 24-08-2016
Publisher: Springer Science and Business Media LLC
Date: 19-09-2012
Publisher: Informa UK Limited
Date: 30-03-2016
Publisher: American Chemical Society (ACS)
Date: 19-07-2017
Publisher: Elsevier BV
Date: 02-2020
DOI: 10.1016/J.JENVMAN.2019.109744
Abstract: Methane production via anaerobic digestion of poultry litter provides a pathway for energy production from an abundant waste product. Recent studies have shown the use of biochar (pyrolysed biomass) can decrease methane production lag times and increase peak daily yields from ammonia-stressed low-solids anaerobic digesters. Due to the variety of feedstocks and digester configurations used, research to date has not yet determined the effect of biochar addition as a function of the digester total solids content. This study shows the addition of biochar reduces the lag time by a greater percentage in the digesters with a higher total solids content. There was a 17%, 27% and 41% reduction lag time due to biochar addition at total solids contents of 5%, 10% and 20%, respectively. The peak daily methane yield increased by 136% at 10% total solids. There was no significant increase in the peak yield at 5% total solids, while there was a 46% increase at 20% total solids. Real-time PCR analysis confirms the Methanosaetaceae family, which is a key methanogen due to its ability to facilitate direct interspecies electron transfer while attached to biochar, preferentially attaches to biochar. Furthermore, this research shows the attachment of the Methanosaetaceae family, does not decrease with increasing total solids content. A potential negative effect of biochar addition, a reduced volumetric efficiency, can be negated by using a shorter retention time. This new understanding will help to improve predictions of the impact of biochar addition for new digester designs operating in semi-solids and high-solids conditions.
Publisher: Elsevier BV
Date: 05-2011
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 04-2020
Publisher: Springer Science and Business Media LLC
Date: 02-04-2011
Publisher: Elsevier BV
Date: 2016
Publisher: American Chemical Society (ACS)
Date: 05-07-2018
Publisher: Elsevier BV
Date: 02-2020
DOI: 10.1016/J.BIORTECH.2019.122457
Abstract: This study characterises the effect of biochar (pyrolysed biomass) produced from wood pellets, wheat straw and sheep manure on high-solids anaerobic digestion (HSAD) of poultry litter. Also, pre-loading biochar with microorganisms before addition to HSADs was investigated. The addition of wood pellet biochar provides a 32% increase to the methane yield compared with control digesters. The addition of biochar produced from either wheat straw or sheep manure has detrimental effects on digester performance compared with controls. The addition of wood pellet biochar pre-loaded by placing it in a high-solids digester for 90 days provides a 69% increase in the total methane yield, 44% increase in the peak daily methane yield and a 33% reduction in the lag time compared with controls. This study highlighted a need for careful selection of parent material for biochar production and, for the first time, the opportunities to re-use wood pellet biochar for further improvements.
Publisher: Elsevier BV
Date: 05-2012
Publisher: No publisher found
Date: 2023
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 02-2013
DOI: 10.2514/1.J051793
Publisher: Elsevier BV
Date: 04-2017
Publisher: MDPI AG
Date: 07-12-2022
Abstract: In the original publication [...]
Publisher: Springer Science and Business Media LLC
Date: 2015
Publisher: American Institute of Aeronautics and Astronautics
Date: 09-01-2012
DOI: 10.2514/6.2012-821
Publisher: Optica Publishing Group
Date: 09-08-2007
DOI: 10.1364/AO.46.005823
Abstract: Planar nephelometry is a laser-based technique of imaging the light scattered from particles to provide information about the local number density of these particles. In many seeded flows of practical interest, such as pulverized coal flames, particle loadings are sufficiently high for the incident laser beam to be severely attenuated. Measurements in these flows are therefore difficult, and limited data are available under these conditions. Laser attenuation experiments were conducted in suspensions of spherical particles in water at various concentrations. This is used to formulate a calibration for the effects of diffuse scattering and laser sheet extinction. A model for the distribution of light through a heavily seeded, light-scattering medium is also developed and is compared with experimental results. It is demonstrated that the scattered signal may be considered proportional to the local particle concentration multiplied by the incident laser power. The incident laser power varies as a function of the attenuation by obscurement. This correction for planar nephelometry images thus extends the technique to provide pseudoquantitative data for instantaneous particle concentration measurements.
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 03-2009
Publisher: IEEE
Date: 10-2019
Publisher: Elsevier BV
Date: 02-2023
Publisher: IEEE
Date: 10-2014
Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 11-2009
DOI: 10.2514/1.43716
Publisher: Informa UK Limited
Date: 03-07-2019
Publisher: Springer Science and Business Media LLC
Date: 25-04-2016
No related grants have been discovered for Cristian Birzer.