Entrainment and Mixing in Turbulent Negatively Buoyant Jets and Fountains. The project intends to develop tools to accurate predict fountain flows. Volcanic eruptions, building ventilation and brine discharge from desalination plants are all examples of turbulent fountains and negatively buoyant jets. The project aims to conduct an investigation into the turbulent structure of fountains and negatively buoyant jets using numerical simulation and laboratory experiments, and to assess the accuracy ....Entrainment and Mixing in Turbulent Negatively Buoyant Jets and Fountains. The project intends to develop tools to accurate predict fountain flows. Volcanic eruptions, building ventilation and brine discharge from desalination plants are all examples of turbulent fountains and negatively buoyant jets. The project aims to conduct an investigation into the turbulent structure of fountains and negatively buoyant jets using numerical simulation and laboratory experiments, and to assess the accuracy of the commonly used integral models and test the effect of the use of more accurate entrainment relations. This may have a range of applications – enabling better prediction of environmental impacts, reduction of the adverse effects of the discharge of pollutants, and reduction in energy consumption in building ventilation and other industrial applications.Read moreRead less
Thermal stratification, overturning and mixing in riverine environments. Thermal stratification is common in Australia's rivers due to our hot, drought-prone climate and high human demands relative to available supply, which has led to a significant reduction in flows relative to natural levels. Thermal stratification inhibits mixing, creating stagnant conditions characterised by low oxygen levels and increased concentrations of contaminants, leading to algal blooms, fish kills and systemic dama ....Thermal stratification, overturning and mixing in riverine environments. Thermal stratification is common in Australia's rivers due to our hot, drought-prone climate and high human demands relative to available supply, which has led to a significant reduction in flows relative to natural levels. Thermal stratification inhibits mixing, creating stagnant conditions characterised by low oxygen levels and increased concentrations of contaminants, leading to algal blooms, fish kills and systemic damage to ecosystems. The aim of this project is to develop predictive models for the effects of physical processes such as night-time cooling, wind, turbulence and currents on riverine thermal stratification. This is expected to enable a more accurate determination of the flow rates required to maintain the health of our river systems.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE120102942
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
The general Richtmyer-Meshkov instability in magnetohydrodynamics. Fluid dynamic instabilities limit the chance of inertial confinement fusion, a carbon-free process, achieving net energy production. In highly idealised circumstances it has been shown that one of these instabilities can be suppressed by a magnetic field, a phenomenon that this project will investigate in the general case.
The converging shock driven Richtmyer-Meshkov instability in magnetohydrodynamics. Fluid dynamic instabilities limit the chance of inertial confinement fusion, a carbon-free process, achieving net energy production. The project will investigate the effectiveness and consequences of suppressing one of these instabilities with a magnetic field.
Systematically model the large-scale complexity of turbulent floods and thin film flows. This project continues development of new models, and computer
simulation, of turbulent flood, river and estuarine flow. The models
will be based systematically upon established turbulence models to
resolve accurately the complex physical processes. The development of
new and robust computer models for thin layers of coating fluid will
aid many industrial processes. We also aim to provide correct ini ....Systematically model the large-scale complexity of turbulent floods and thin film flows. This project continues development of new models, and computer
simulation, of turbulent flood, river and estuarine flow. The models
will be based systematically upon established turbulence models to
resolve accurately the complex physical processes. The development of
new and robust computer models for thin layers of coating fluid will
aid many industrial processes. We also aim to provide correct initial
conditions and boundary conditions for simpler cases of the above
flows. The approach leads to a greater understanding of the range of
applicability of the models through better estimating the errors in the
modelling process. The project develops a fundamental enabling
methodology for engineering and the sciences.
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Investigation and optimisation of displacement ventilation and cooling systems. An accurate optimisation design tool for cooling and ventilation will be of considerable benefit to the Australian building/construction industry, and will lead to a reduction in energy consumption, thereby reducing both consumer costs and Australia's total greenhouse gas output, as well as providing Australian industry with a competitive advantage. Turbulence modelling for stratified fluids is one of the grand chall ....Investigation and optimisation of displacement ventilation and cooling systems. An accurate optimisation design tool for cooling and ventilation will be of considerable benefit to the Australian building/construction industry, and will lead to a reduction in energy consumption, thereby reducing both consumer costs and Australia's total greenhouse gas output, as well as providing Australian industry with a competitive advantage. Turbulence modelling for stratified fluids is one of the grand challenge areas of science, and graduate students and postdoctoral researchers trained in this area will be well placed to make a significant contribution to the new technologies needed to address the major environmental problems currently being faced.Read moreRead less
Turbulent fountains in stratified fluids with opposing buoyancy flux. Improved design tools will be developed for use in industries which must deal with turbulent fountains in stratified fluids. These tools will assist in the design of more efficient apparatus, reducing energy consumption and thereby reducing both consumer costs and Australia's total greenhouse gas output, as well as providing Australian industry with a competitive advantage. Turbulence modelling for stratified fluids is one of ....Turbulent fountains in stratified fluids with opposing buoyancy flux. Improved design tools will be developed for use in industries which must deal with turbulent fountains in stratified fluids. These tools will assist in the design of more efficient apparatus, reducing energy consumption and thereby reducing both consumer costs and Australia's total greenhouse gas output, as well as providing Australian industry with a competitive advantage. Turbulence modelling for stratified fluids is one of the grand challenge areas of science, and graduate students and postdoctoral researchers trained in this will provide continuing service to Australia in many areas of advanced engineering and science. Read moreRead less
An Investigation Into Fountains Interacting With Both Free Surface and Solid Boundaries. This project will produce an improved understanding of the behavior of fountains interacting with both free surface and solid boundaries. Such flows occur in many environmental and industrial processes and, in particular, the interaction of fountain with boundaries will have a significant influence on the overall performance of the processes. This investigation will combine experiments, numerical simulations ....An Investigation Into Fountains Interacting With Both Free Surface and Solid Boundaries. This project will produce an improved understanding of the behavior of fountains interacting with both free surface and solid boundaries. Such flows occur in many environmental and industrial processes and, in particular, the interaction of fountain with boundaries will have a significant influence on the overall performance of the processes. This investigation will combine experiments, numerical simulations and scaling analysis to provide new insight into the physics governing the behavior of these impinging fountains. Turbulence models will be developed and validated and scaling formulae will be obtained providing relationships for the basic flow properties in terms of the control parameters.Read moreRead less
Flow generated by ducted surface pumps: buoyant jets at high Reynolds numbers and low Froude numbers. Ducted surface pumps are used in reservoirs to circulate and destratify the water in order to maintain its general quality and reduce the incidence of toxic algal blooms. This project aims to improve our understanding of the circulation and mixing behaviour of the large, low velocity jets, plumes and fountains created by these pumps. Computational fluid dynamics, laboratory and field studies wil ....Flow generated by ducted surface pumps: buoyant jets at high Reynolds numbers and low Froude numbers. Ducted surface pumps are used in reservoirs to circulate and destratify the water in order to maintain its general quality and reduce the incidence of toxic algal blooms. This project aims to improve our understanding of the circulation and mixing behaviour of the large, low velocity jets, plumes and fountains created by these pumps. Computational fluid dynamics, laboratory and field studies will be used to model and map these flow fields. The findings will have a number of potential applications including methods for improving water quality in and downstream of storages.Read moreRead less
Physical factors affecting deposition of combustion submicrometer particles in the human lung. Particles generated from combustion sources have a profound effect on human health, yet there is lack of scientific understanding of the role of different physical mechanisms on particle deposition in the lung. This program will advance scientific knowledge in this field through multidisciplinary efforts of a team from QUT and the University of Salzburg, Austria. It aims at quantification of particle d ....Physical factors affecting deposition of combustion submicrometer particles in the human lung. Particles generated from combustion sources have a profound effect on human health, yet there is lack of scientific understanding of the role of different physical mechanisms on particle deposition in the lung. This program will advance scientific knowledge in this field through multidisciplinary efforts of a team from QUT and the University of Salzburg, Austria. It aims at quantification of particle deposition in human lung through experimental studies and advanced modelling. The program will enhance and strengthen the existing collaboration between the universities and its outcome will be of significance in the vital area of human health and risk assessment.Read moreRead less