Studies of turbulence and coherent structures in quasi two-dimensional plasmas and fluids. One of the most celebrated but least understood complex systems in nature is turbulent flow. This cross-disciplinary project aims to contribute to basic scientific knowledge of a class of turbulent flows, known as quasi two-dimensional fluids, that typically exhibit self-organizing properties, stable sheared flow, and relatively weak dissipation. The significance lies in the proposed testing, by modelling ....Studies of turbulence and coherent structures in quasi two-dimensional plasmas and fluids. One of the most celebrated but least understood complex systems in nature is turbulent flow. This cross-disciplinary project aims to contribute to basic scientific knowledge of a class of turbulent flows, known as quasi two-dimensional fluids, that typically exhibit self-organizing properties, stable sheared flow, and relatively weak dissipation. The significance lies in the proposed testing, by modelling and simulation studies, of the well-grounded hypothesis that suppression of turbulence by sheared flow is a universal phenomenon in such fluids, and that it can be exploited to control transport of fluid constituents. Applications of this new knowledge will be developed.Read moreRead less
Low-order dynamical models for non-linear fluid behaviour in quasi two-dimensional plasmas. Two complex systems in which a magnetic field imposes two-dimensional fluid motions are turbulent fusion plasmas and magnetospheric plasmas. A distinctive property of 2D flows is the inverse energy cascade, whereby energy streaming into large-scale vortices, coherent structures, or sheared flows gives a remarkable propensity for self-organizing behaviour. This can be exploited to govern or guide our respo ....Low-order dynamical models for non-linear fluid behaviour in quasi two-dimensional plasmas. Two complex systems in which a magnetic field imposes two-dimensional fluid motions are turbulent fusion plasmas and magnetospheric plasmas. A distinctive property of 2D flows is the inverse energy cascade, whereby energy streaming into large-scale vortices, coherent structures, or sheared flows gives a remarkable propensity for self-organizing behaviour. This can be exploited to govern or guide our response to such systems. We propose to investigate the dynamics of momentum and energy exchange in these plasmas, using reduced dynamical models and bifurcation and stability mathematics. Expected outcomes are improved prediction of magnetospheric substorms and confinement of fusion plasmas.
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Renewable energy generation from flow-induced vibration. Much engineering effort has been expended to eliminate vibration of marine structures. This project seeks to provide the basis for the development of tidal energy harnessing, by deliberately amplifying and harnessing vibration. This technology offers the promise of capturing clean, zero-emissions energy, while presenting no risk to marine life.
Discovery Early Career Researcher Award - Grant ID: DE160100742
Funder
Australian Research Council
Funding Amount
$315,000.00
Summary
Biofilms in two-dimensional turbulent flows:effects on Lagrangian transport. This project aims to investigate how surface biofilms affect flows at the ocean surface. Great stretches of the ocean surface are covered by an organic microlayer called biofilm. Flows at the ocean surface are a crucial part of climate machinery, and biofilms have profound, largely unexplored effects on these flows. There is no fundamental understanding of how biofilms affect fluid motion. This project aims to use labor ....Biofilms in two-dimensional turbulent flows:effects on Lagrangian transport. This project aims to investigate how surface biofilms affect flows at the ocean surface. Great stretches of the ocean surface are covered by an organic microlayer called biofilm. Flows at the ocean surface are a crucial part of climate machinery, and biofilms have profound, largely unexplored effects on these flows. There is no fundamental understanding of how biofilms affect fluid motion. This project aims to use laboratory models and new measurement techniques to study and quantify the impact of biofilms on turbulent transport. Understanding these effects is important in a time of climate change and this knowledge may also help address environmental issues related to spreading of pollutants and flow control at the ocean surface.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120100364
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Understanding winds: energy transfer in rotating turbulent fluids. The Earth's rotation affects how large atmospheric winds and cyclones interact with each other and with the surface of our planet. This controls how the wind energy is distributed in the global atmosphere. By studying rotating turbulence in laboratory experiments, we can improve our understanding of atmospheric dynamics and make better predictions in meteorology, and atmospheric physics.
Extreme wave events on the water surface. Giant waves observed in the ocean present a catastrophic threat to ships and offshore structures. Rogue waves in optical fibres, on the other hand, may help developing powerful light sources for long-distance telecommunications. This study of capillary rogue waves on the water surface will help to predict and control the probability of extreme waves.
Transport barriers in complex turbulent flows: formation, detection and characterization. Barriers to transport in complex fluid flows are ubiquitous in nature, yet mathematical and numerical approaches have so far been unable to solve this problem in the presence of turbulence. This project aims to undertake the first systematic laboratory study of transport barrier generation, control and interactions to reveal the role of turbulence in the stochastic transport in fluids. It will develop new m ....Transport barriers in complex turbulent flows: formation, detection and characterization. Barriers to transport in complex fluid flows are ubiquitous in nature, yet mathematical and numerical approaches have so far been unable to solve this problem in the presence of turbulence. This project aims to undertake the first systematic laboratory study of transport barrier generation, control and interactions to reveal the role of turbulence in the stochastic transport in fluids. It will develop new methods of transport barrier modelling which will equip specialists dealing with Lagrangian transport with new tools for the transport barrier modelling and characterisation.Read moreRead less
Novel methods of spill containment and debris mitigation on water surfaces. Novel methods of spill containment and debris mitigation on water surfaces. This project aims to develop a new technology for debris mitigation and spill containment, which isolates and stops spreading spills and redirect surface pollutants without using physical boundaries. Unexpected forced shutdowns of power plants, when floating debris blocks cooling water intake facilities, cause substantial operational risks, capit ....Novel methods of spill containment and debris mitigation on water surfaces. Novel methods of spill containment and debris mitigation on water surfaces. This project aims to develop a new technology for debris mitigation and spill containment, which isolates and stops spreading spills and redirect surface pollutants without using physical boundaries. Unexpected forced shutdowns of power plants, when floating debris blocks cooling water intake facilities, cause substantial operational risks, capital loss and affect the reliability of the electricity supply. The laboratory demonstration prototype, to be built as part of this project, could be scaled-up to demonstrate industrial applications such as the mitigation of blockages in water intakes of power plants and oil spill containment in estuaries. Anticipated outcomes are reduced operational risks in the electricity supply sector, and improved energy security.Read moreRead less
Dynamic tomography: high-resolution, four-dimensional imaging of processes. This project will develop imaging technology that allows us to collect detailed, three dimensional movies of complex, microscopic processes in a laboratory. This technology will have applications in soil science, biology, oil extraction, and carbon sequestration.