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Discovery Early Career Researcher Award - Grant ID: DE240100933
Funder
Australian Research Council
Funding Amount
$458,183.00
Summary
Noise-reduction mechanisms in jet engines: chevrons are the answer. This project aims to develop new models to study the influence of chevrons on the exhaust of aircraft engines, which is one of the strongest sound sources during take-off. As constant exposure to high-amplitude noise in areas close to airports leads to a myriad of health problems, new strategies have been sought to mitigate this noise component. Chevrons may modify the dynamics of the noise-generating coherent structures, but mo ....Noise-reduction mechanisms in jet engines: chevrons are the answer. This project aims to develop new models to study the influence of chevrons on the exhaust of aircraft engines, which is one of the strongest sound sources during take-off. As constant exposure to high-amplitude noise in areas close to airports leads to a myriad of health problems, new strategies have been sought to mitigate this noise component. Chevrons may modify the dynamics of the noise-generating coherent structures, but most of their parameters are chosen by trial and error, and the mechanism that maximises noise reduction is not clear. By understanding the underlying noise-reduction mechanisms, this project will facilitate the optimal design of quieter exhaust nozzles, ameliorating the effect of aircraft noise on the local community.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE240100755
Funder
Australian Research Council
Funding Amount
$430,788.00
Summary
Fluid dynamics of underground hydrogen storage. The project seeks to understand the flow of hydrogen in underground porous layers. This will be achieved through mathematical models of the continuum mechanics governing the injection and withdrawal of hydrogen. The framework will account for a variety of physical and biological mechanisms. Underground storage of zero-carbon hydrogen provides an ideal route to overcome the intermittency of renewable energy. The project outcomes include a mathematic ....Fluid dynamics of underground hydrogen storage. The project seeks to understand the flow of hydrogen in underground porous layers. This will be achieved through mathematical models of the continuum mechanics governing the injection and withdrawal of hydrogen. The framework will account for a variety of physical and biological mechanisms. Underground storage of zero-carbon hydrogen provides an ideal route to overcome the intermittency of renewable energy. The project outcomes include a mathematical description of the response of two-phase flow instabilities to injection and withdrawal, and dynamical insights into the role of microbial growth on flow in porous media. Expected benefits are increased efficiency of hydrogen recovery and the reduced cost of site selection.
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Bubble clouds in ocean waves. This project aims to predict the behaviour of bubble clouds in ocean waves. Bubble clouds are used in Europe to shield marine mammals from the dangerous noise of offshore wind-turbine construction, but would be dispersed by Australia's ocean swell and turbulence; and unlike in Europe, Australia's offshore-wind sites are frequented by endangered whales. Bubble clouds from breaking waves may also dissolve up to third of humanity's carbon in the ocean. Experiments and ....Bubble clouds in ocean waves. This project aims to predict the behaviour of bubble clouds in ocean waves. Bubble clouds are used in Europe to shield marine mammals from the dangerous noise of offshore wind-turbine construction, but would be dispersed by Australia's ocean swell and turbulence; and unlike in Europe, Australia's offshore-wind sites are frequented by endangered whales. Bubble clouds from breaking waves may also dissolve up to third of humanity's carbon in the ocean. Experiments and coordinated numerical simulations would predict the displacement and dispersion of bubbles in oceanic conditions. Experiments and simulations would then predict the acoustic behaviour of bubble clouds. This outcome would benefit new offshore-wind industries and climate science.Read moreRead less
Hydrodynamics of quantum fluids. Since the 19th century, the governing equations of classical fluid dynamics or hydrodynamics have been an indispensable tool for transformative applications in aeronautics, medicine, and climate science. However, the applicability of hydrodynamics to the realm of quantum matter and quantum fluids is not well understood. This project intends to fill in this knowledge gap by developing new hydrodynamic theories of quantum fluids formed by ultracold quantum gases. T ....Hydrodynamics of quantum fluids. Since the 19th century, the governing equations of classical fluid dynamics or hydrodynamics have been an indispensable tool for transformative applications in aeronautics, medicine, and climate science. However, the applicability of hydrodynamics to the realm of quantum matter and quantum fluids is not well understood. This project intends to fill in this knowledge gap by developing new hydrodynamic theories of quantum fluids formed by ultracold quantum gases. The expected outcomes are the knowledge and theoretical tools required to underpin Australia’s advances in quantum technology applications, such as the design of quantum heat engines, control of heat transport in quantum nanowires, and fabrication of new energy efficient materials.Read moreRead less
Early Career Industry Fellowships - Grant ID: IE230100476
Funder
Australian Research Council
Funding Amount
$465,237.00
Summary
Development of rapid-response thermal batteries for the global market. In collaboration with Isothermix, this project aims to develop and commercialize cost-effective, rapid-response thermal batteries to meet the air conditioning peak demand of buildings. This project expects to generate new knowledge about the phase change materials which can be used to store thermal energy across a range of temperatures and the highly thermal conductive materials which can be used as a heat exchanger. Expected ....Development of rapid-response thermal batteries for the global market. In collaboration with Isothermix, this project aims to develop and commercialize cost-effective, rapid-response thermal batteries to meet the air conditioning peak demand of buildings. This project expects to generate new knowledge about the phase change materials which can be used to store thermal energy across a range of temperatures and the highly thermal conductive materials which can be used as a heat exchanger. Expected outcomes include the development of rapid response thermal batteries which can cool buildings across a range of temperatures and site conditions. This should provide significant benefits by reducing primary heating and cooling plant capacity and thereby our reliance on fossil fuels.Read moreRead less
The fluid dynamics of intrusions. This project aims to investigate intrusions, the primarily horizontal flows of well-mixed fluid into density-stratified surroundings. Such flows are fundamental in the atmosphere and oceans, but they are little understood because they are controlled by strong feedback between the intrusion and internal waves generated in the stratified ambient. Existing studies rely on computationally intensive simulations, analogue experiments or ad-hoc models of limited appl ....The fluid dynamics of intrusions. This project aims to investigate intrusions, the primarily horizontal flows of well-mixed fluid into density-stratified surroundings. Such flows are fundamental in the atmosphere and oceans, but they are little understood because they are controlled by strong feedback between the intrusion and internal waves generated in the stratified ambient. Existing studies rely on computationally intensive simulations, analogue experiments or ad-hoc models of limited applicability. This project expects to develop and validate a new, broadly applicable and rigorous mathematical model for such flows. Expected benefits include improved volcanic ash dispersal modelling and improved understanding of climate-critical oceanic and atmospheric flows.Read moreRead less
Dynamics of fire whirls and dust devils. The project aims to develop fundamental understanding and models to inform the development of more accurate computer models of fire front propagation. Fire whirls and dust devils are strongly swirling localised vortex flows that result from an interplay of circulation and buoyancy, may extend hundreds of metres into the air. By projecting firebrands well away from the ground strike, fire whirls can initiate spot fires well beyond a fire front, advancing f ....Dynamics of fire whirls and dust devils. The project aims to develop fundamental understanding and models to inform the development of more accurate computer models of fire front propagation. Fire whirls and dust devils are strongly swirling localised vortex flows that result from an interplay of circulation and buoyancy, may extend hundreds of metres into the air. By projecting firebrands well away from the ground strike, fire whirls can initiate spot fires well beyond a fire front, advancing fronts at much higher speeds than most fire spread models predict. The project aims to improve understanding of the sets of local conditions that produce and stabilise these flows, using computational fluid dynamics matched to laboratory experiments and dimensional analysis of results.Read moreRead less
Catastrophic transition to turbulence in rotation-dominated flows. Rotation-dominated flows are very common in engineering applications and fluid dynamics of the Earth's atmosphere, oceans, and core. Such flows are known to make a sudden transition from an orderly to an energetic turbulent state and this project aims to discover the reason why.
The fluid mechanics of dynamically constricted tubes in pulsatile flow. This project is aimed at advancing the fundamental understanding of flow instability, the transition to turbulence and the effect on wall shear stress, in a dynamically constricted tube flow. The project will provide the first accurately resolved experimental flow analysis, using tomographic particle imaging velocimetry and 3D laser doppler anemometry, conducted on a novel experimental model, and will resolve, for the first ....The fluid mechanics of dynamically constricted tubes in pulsatile flow. This project is aimed at advancing the fundamental understanding of flow instability, the transition to turbulence and the effect on wall shear stress, in a dynamically constricted tube flow. The project will provide the first accurately resolved experimental flow analysis, using tomographic particle imaging velocimetry and 3D laser doppler anemometry, conducted on a novel experimental model, and will resolve, for the first time, turbulence characteristics of the dynamic constriction, using direct numerical simulation with a novel moving boundary implementation. The outcomes will provide the key link between fluid mechanics and wall shear stress, allowing future progress to be made in elucidating the causes of cardiovascular disease.
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Investigation into flow over complex topography and escarpments for wind turbine siting using experimental and computational methods. This project will improve national capability to optimise power production from wind turbine farms in complex terrain by improving the understanding of the flow regime. By better understanding separated regions and the turbulent structures within these regions power production can be optimised and fatigue risks associated with turbine positioning in complex sites ....Investigation into flow over complex topography and escarpments for wind turbine siting using experimental and computational methods. This project will improve national capability to optimise power production from wind turbine farms in complex terrain by improving the understanding of the flow regime. By better understanding separated regions and the turbulent structures within these regions power production can be optimised and fatigue risks associated with turbine positioning in complex sites can be reduced. This will improve confidence in wind farm site assessment techniques and consequently reduce economic risks associated with current wind farm viability assessments. By increasing national capacity to generate clean energy stationary energy emissions can be reduced. This project will also deliver high calibre graduates that will be potential future industry leaders.Read moreRead less