Genesis and evolution of coherent structures in wall-bounded turbulence. This project aims to capture conditions responsible for the generation of the coherent structures that are formed in wall-bounded turbulent flows, through the use of variational data assimilation and adjoint-based optimisation techniques. The project is expected to provide knowledge and intellectual property that is essential for the accurate modelling and prediction of the interaction between the ground-level activities li ....Genesis and evolution of coherent structures in wall-bounded turbulence. This project aims to capture conditions responsible for the generation of the coherent structures that are formed in wall-bounded turbulent flows, through the use of variational data assimilation and adjoint-based optimisation techniques. The project is expected to provide knowledge and intellectual property that is essential for the accurate modelling and prediction of the interaction between the ground-level activities like pollutant emissions and the atmosphere and the flow over vehicles through pipes, turbines and compressors. This project will provide benefits such as reducing the risk in environmental and commercial design and decision making and will facilitate new opportunities for the commercial development of devices to reduce drag and enhance mixing and heat transfer via the direct manipulation of coherent structures.Read moreRead less
Dynamics of Suppressed Mixing Regimes in Australian Rivers. This study aims to further the fundamental science of turbulent mixing in the context of flow in Australian rivers. The focus is on prolonged low flow conditions which when coupled with warm surface temperatures cause the water column to become thermally stratified which then suppresses turbulent mixing. The extreme scale of the river systems has made investigating the true dynamics of the strongly stratified mixing regimes particularly ....Dynamics of Suppressed Mixing Regimes in Australian Rivers. This study aims to further the fundamental science of turbulent mixing in the context of flow in Australian rivers. The focus is on prolonged low flow conditions which when coupled with warm surface temperatures cause the water column to become thermally stratified which then suppresses turbulent mixing. The extreme scale of the river systems has made investigating the true dynamics of the strongly stratified mixing regimes particularly challenging. By taking world first in-situ measurements of turbulent mixing and undertaking high resolution numerical simulations this study will provide definitive data which will allow correct characterization of the mixing regimes and how they are associated with river flow conditions.Read moreRead less
Structural transitions in turbulent fluids and plasma through self-organization. Studies into structural transitions in turbulent systems will greatly benefit Australia through its contributions to the science of complex systems, in the areas of self-organization and turbulence control. Applications range from understanding the formation of the Earth's atmospheric spectrum to generation of transport barriers in magnetically confined plasma, as well as development of novel methods of turbulence c ....Structural transitions in turbulent fluids and plasma through self-organization. Studies into structural transitions in turbulent systems will greatly benefit Australia through its contributions to the science of complex systems, in the areas of self-organization and turbulence control. Applications range from understanding the formation of the Earth's atmospheric spectrum to generation of transport barriers in magnetically confined plasma, as well as development of novel methods of turbulence control in engineering. Recent discoveries by the authors open a window of opportunity for a breakthrough in this fundamental field of modern science. The project is based on several national and international collaborations. Australian postgraduate and research training is an integral part of the project.Read moreRead less
Special Research Initiatives - Grant ID: SR0354716
Funder
Australian Research Council
Funding Amount
$10,000.00
Summary
Energetically Open Systems Research Network Study. Conceptual frameworks arising in the physical sciences, such as non-equilibrium statistical mechanics and thermodynamics, synergetics, chaos and dynamical systems theory, are seminal in the emerging science of complexity. This study will lay the groundwork for a network to link Australian and overseas research on these fundamental concepts, and their application within the context of entropy-producing systems vital to the long-term sustainabilit ....Energetically Open Systems Research Network Study. Conceptual frameworks arising in the physical sciences, such as non-equilibrium statistical mechanics and thermodynamics, synergetics, chaos and dynamical systems theory, are seminal in the emerging science of complexity. This study will lay the groundwork for a network to link Australian and overseas research on these fundamental concepts, and their application within the context of entropy-producing systems vital to the long-term sustainability of the earth - oceans, atmosphere, biosphere, CO2-free energy production, space and solar environment. The network would facilitate the development of young investigators and be linked into wider complex systems networks such as the CSIRO Centre for Complex Systems Science.Read moreRead less
Understanding and predicting submarine hydrofoil noise. Australia needs to develop a more sophisticated underwater flow-induced noise research and development capability if it is to achieve its ambitious naval plans set out under the Defence White Paper. This project will develop an experimentally validated model to predict submarine noise for the purposes of submarine design, operation and procurement.
Sensitivity and Change in the Global Ocean Overturning. The dynamics of the global, deep overturning circulation in the oceans and the way this adjusts to increasing greenhouse forcing will be examined in order to improve our conceptual knowledge of the oceans and the accuracy of climate models. By understanding how the ocean responds to changing surface heat and freshwater fluxes, and particularly the global role of rapid changes in high-latitude seas, we aim to help refine estimates of climate ....Sensitivity and Change in the Global Ocean Overturning. The dynamics of the global, deep overturning circulation in the oceans and the way this adjusts to increasing greenhouse forcing will be examined in order to improve our conceptual knowledge of the oceans and the accuracy of climate models. By understanding how the ocean responds to changing surface heat and freshwater fluxes, and particularly the global role of rapid changes in high-latitude seas, we aim to help refine estimates of climate response times and the warming expected for a given increase in atmospheric greenhouse gases. These two important characteristics of the climate system underlie climate change policy decisions.Read moreRead less
WAKE FLOWS WITH UPSTREAM TURBULENCE IN MARINE, ATMOSPHERIC AND BUILT ENVIRONMENTS. Through improved understanding of turbulent wakes the project will have applications across aeronautics and hydrodynamics, leading to more efficient engineering designs to reduce flow drag. In marine environments our findings will improve coastal ocean models and the prediction of pollutant dispersal, nutrient fluxes and sediment transport, and contribute to the management of biological productivity (NRP 1.5). In ....WAKE FLOWS WITH UPSTREAM TURBULENCE IN MARINE, ATMOSPHERIC AND BUILT ENVIRONMENTS. Through improved understanding of turbulent wakes the project will have applications across aeronautics and hydrodynamics, leading to more efficient engineering designs to reduce flow drag. In marine environments our findings will improve coastal ocean models and the prediction of pollutant dispersal, nutrient fluxes and sediment transport, and contribute to the management of biological productivity (NRP 1.5). In the atmospheric boundary layer, the results will assist planners to improve wind environments near large buildings or clusters of buildings, benefiting the safety of aircraft at takeoff and landing. The project will develop collaboration and help maintain the strength of Australian research in environmental flows.Read moreRead less
From The Ocean Depths To Abrupt Climate Change - Missing Processes In The Global Overturning Circulation. The overturning circulation of the oceans is a driver of large and surprisingly abrupt climate shifts. We aim to understand the factors that control the rate of overturning, and whether it might soon slow down or cease owing to global warming. We also aim to resolve one of the biggest conundrums in oceanography by reconciling theoretical and measured rates of mixing in the deep ocean. Improv ....From The Ocean Depths To Abrupt Climate Change - Missing Processes In The Global Overturning Circulation. The overturning circulation of the oceans is a driver of large and surprisingly abrupt climate shifts. We aim to understand the factors that control the rate of overturning, and whether it might soon slow down or cease owing to global warming. We also aim to resolve one of the biggest conundrums in oceanography by reconciling theoretical and measured rates of mixing in the deep ocean. Improved knowledge of deep ocean dynamics, particularly in the Southern Ocean, will help us gauge the likely nature and pace of imminent climate changes in the Australian region, an essential step in assessing the impacts on water resources, ecosystems, agriculture, and energy demands. The research will add to a major new initiative in marine science at ANU.Read moreRead less
New method of remote characterization of hydrocarbon films on the ocean surface through studies of wave turbulence. Development of a novel method of remote characterization of oil films on the sea surface will help early detection of oil spills in environmental monitoring. It will also be used for detection of naturally occurring oil seeps in the oil exploration on the sea shelf. The project addresses the national research priority of Environmentally Sustainable Australia and the priority goal o ....New method of remote characterization of hydrocarbon films on the ocean surface through studies of wave turbulence. Development of a novel method of remote characterization of oil films on the sea surface will help early detection of oil spills in environmental monitoring. It will also be used for detection of naturally occurring oil seeps in the oil exploration on the sea shelf. The project addresses the national research priority of Environmentally Sustainable Australia and the priority goal of developing deep earth resources. Australian industry will greatly benefit from the outcome of the project. These studies will also help advancing Australia's position at the forefront of remote sensing research. Australian undergraduate, postgraduate and research training is an integral part of the project.Read moreRead less
Atomisation and Combustion Physics of Australian Bio-oils. Australia is highly dependent on fossil fuels for energy production and transport, and this dependence is growing. Wide spread substitution of liquid hydrocarbon fuels by indigenous renewable bio-oil has the potential to improve Australian's energy outlook and assist in reaching greenhouse gas targets. Understanding the interrelationships between the physical and chemical properties of bio-oil, its atomisation, droplet formation and com ....Atomisation and Combustion Physics of Australian Bio-oils. Australia is highly dependent on fossil fuels for energy production and transport, and this dependence is growing. Wide spread substitution of liquid hydrocarbon fuels by indigenous renewable bio-oil has the potential to improve Australian's energy outlook and assist in reaching greenhouse gas targets. Understanding the interrelationships between the physical and chemical properties of bio-oil, its atomisation, droplet formation and combustion physics is fundamental to the delivery of an efficient and reliable combustion process using this fuel. Measurements using laser based diagnostics of the atomisation flow, droplet formation and combustion process will provide the experimental data to understand this complex interrelationship.Read moreRead less