Discovery Early Career Researcher Award - Grant ID: DE150100161
Funder
Australian Research Council
Funding Amount
$375,000.00
Summary
Reducing drag by controlling wall turbulence. Wall turbulence is a critically important phenomenon for any system where fluid flows past an object. Wall turbulence is responsible for 90 per cent of the drag experienced by a large crude tanker, to give just one example. This project aims to investigate novel ways to control wall turbulence by exploiting the presence of recently-discovered large-scale structures. This will lead to significant reductions in the drag and fuel burnt by transport vehi ....Reducing drag by controlling wall turbulence. Wall turbulence is a critically important phenomenon for any system where fluid flows past an object. Wall turbulence is responsible for 90 per cent of the drag experienced by a large crude tanker, to give just one example. This project aims to investigate novel ways to control wall turbulence by exploiting the presence of recently-discovered large-scale structures. This will lead to significant reductions in the drag and fuel burnt by transport vehicles.Read moreRead less
Rarefied hypervelocity separated flow in the transitional to continuum regimes. The transition regime for low-density flows is a no-man's-land between free-molecular and continuum flow, where the flow behaves differently to the assumptions typically used for modelling either flow type. Bird's direct Simulation Monte Carlo (DSMC) method is typically thought to be the best way of modelling these flows, but has not produced excellent agreement with previous experiments on low-density separated flow ....Rarefied hypervelocity separated flow in the transitional to continuum regimes. The transition regime for low-density flows is a no-man's-land between free-molecular and continuum flow, where the flow behaves differently to the assumptions typically used for modelling either flow type. Bird's direct Simulation Monte Carlo (DSMC) method is typically thought to be the best way of modelling these flows, but has not produced excellent agreement with previous experiments on low-density separated flows, due to computational limitations and lack of knowledge of the flow's internal energy. This proposal is a blind test of the best current DSMC codes against our experiments and a hypersonic continuum code, with the full internal energy state of the flow experimentally quantified for the first time.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE210100852
Funder
Australian Research Council
Funding Amount
$440,675.00
Summary
High-Performance Monolithic Sensor Technology for Corrosive Environments. Based on my recent discovery on giant thermo-/piezo-resistance, this project aims to enhance fundamental understanding and enable the development of high performance silicon carbide based sensors. The project employs these knowledge advancements to develop new sensors with a sensitivity of thousand-fold larger than that of conventional sensors. The project develops multiple sensors and light harvesting cells to be integr ....High-Performance Monolithic Sensor Technology for Corrosive Environments. Based on my recent discovery on giant thermo-/piezo-resistance, this project aims to enhance fundamental understanding and enable the development of high performance silicon carbide based sensors. The project employs these knowledge advancements to develop new sensors with a sensitivity of thousand-fold larger than that of conventional sensors. The project develops multiple sensors and light harvesting cells to be integrated into a monolithic platform that can function in corrosive environments. The sensor technology can be utilised for monitoring structural health, reducing failure and extending lifetime of structures, providing cutting-edge knowledge to petrochemical and mining industries which are of particular importance to Australia.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE200100238
Funder
Australian Research Council
Funding Amount
$426,087.00
Summary
Integrated silicon carbide nanosensors for monitoring extreme environment. This project aims to develop a highly sensitive and reliable sensing platform for structural health monitoring in harsh environments, encompassing high temperature, corrosion, and shock. These conditions have been posing several technical challenges to sensing and electronic devices. The project elucidates the piezoresistive and thermoresistive effects in silicon carbide nanowires, which are the building blocks of robust ....Integrated silicon carbide nanosensors for monitoring extreme environment. This project aims to develop a highly sensitive and reliable sensing platform for structural health monitoring in harsh environments, encompassing high temperature, corrosion, and shock. These conditions have been posing several technical challenges to sensing and electronic devices. The project elucidates the piezoresistive and thermoresistive effects in silicon carbide nanowires, which are the building blocks of robust mechanical and thermal sensors used in extreme conditions. The findings from this project expect to provide Australia with the cutting-edge expertise necessary for developing next-generation monitoring systems in the extreme environments of the oil/gas transportation, mining, automobile, and space exploration industries.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE180100157
Funder
Australian Research Council
Funding Amount
$366,446.00
Summary
Impact of spatially uniform and irregular rough surfaces on drag reduction. This project aims to understand the turbulent transport mechanism for fluid flow over spatially uniform and irregular rough walls. It will provide accurate modelling of irregular roughness and high fidelity simulations. The intended outcomes are physical understanding of the turbulence phenomenon in these flows, and novel flow control of irregular rough wall flows leading to significant drag reduction for transport indus ....Impact of spatially uniform and irregular rough surfaces on drag reduction. This project aims to understand the turbulent transport mechanism for fluid flow over spatially uniform and irregular rough walls. It will provide accurate modelling of irregular roughness and high fidelity simulations. The intended outcomes are physical understanding of the turbulence phenomenon in these flows, and novel flow control of irregular rough wall flows leading to significant drag reduction for transport industries in Australia. Benefits are relevant to both engineering applications involving rough walls and to environmental applications enabling better prediction of particulate matter dispersionRead moreRead less
Micro-perforation for passive drag reduction. This project aims to reduce skin friction drag by developing a novel passive flow control method using micro-perforated surfaces. Advanced analytical and experimental modelling will be used to develop specific design solutions to improve efficiency in many real life applications, such as to reduce drag in the aerospace, maritime, gas pipelines and wind turbine industries. Expected outcomes include widely applicable knowledge and skills, improved mode ....Micro-perforation for passive drag reduction. This project aims to reduce skin friction drag by developing a novel passive flow control method using micro-perforated surfaces. Advanced analytical and experimental modelling will be used to develop specific design solutions to improve efficiency in many real life applications, such as to reduce drag in the aerospace, maritime, gas pipelines and wind turbine industries. Expected outcomes include widely applicable knowledge and skills, improved modelling and experimental techniques and tools, and enhanced collaborations. Benefits to Australia are expected to include significant improvements to the efficiency of the aerospace and energy industries, a boost to the Australian economy, and a reduction in carbon emissions. Read moreRead less
The colour of turbulence and the attached eddy hypothesis. This project aims to progress understanding of wall-bounded turbulence. These turbulent fluid flows are ubiquitous in nature and in engineering systems, directly affecting dispersion in the atmosphere and the energy consumption of land, sea and air vehicles. The understanding of these turbulent flows has been limited by a lack of verified theoretical models for the structure of wall turbulence. By combining unprecedented experiments with ....The colour of turbulence and the attached eddy hypothesis. This project aims to progress understanding of wall-bounded turbulence. These turbulent fluid flows are ubiquitous in nature and in engineering systems, directly affecting dispersion in the atmosphere and the energy consumption of land, sea and air vehicles. The understanding of these turbulent flows has been limited by a lack of verified theoretical models for the structure of wall turbulence. By combining unprecedented experiments with a novel dynamical systems approach, this project will enable development of effective turbulence control strategies, enhancing productivity in a wide range of applications. The findings of the research will enable models with predictive capability to design turbulence control schemes.Read moreRead less
The cost of roughness: predicting the drag penalty of fouled ship hulls. Roughness on ship hulls is a prevalent global problem, causing up to 80% increases in resistance compared to ideal smooth surfaces. Targeting a key capability gap, this project aims to build practical tools for predicting the performance penalty in shipping due to hull roughness, requiring only hull observations as an input. Observations made with a custom-built underwater surface scanner will be combined with world-first l ....The cost of roughness: predicting the drag penalty of fouled ship hulls. Roughness on ship hulls is a prevalent global problem, causing up to 80% increases in resistance compared to ideal smooth surfaces. Targeting a key capability gap, this project aims to build practical tools for predicting the performance penalty in shipping due to hull roughness, requiring only hull observations as an input. Observations made with a custom-built underwater surface scanner will be combined with world-first laser-based flow measurements on the hull of an operating ship, and backed-up by complimentary laboratory experiments. This project will deliver an advanced fundamental understanding of hull roughness and enable more informed decisions for ship operators and regulatory bodies, leading to increased shipping efficiency.Read moreRead less
The effect of non-homogeneous roughness on full-scale drag predictions. Partnering with AkzoNobel, one of the world’s leading suppliers of anti-fouling marine coatings, this project will deliver new tools for predicting the drag penalty on ships fouled by the settlement of marine organisms on the hull. All available predictions assume a homogeneous distribution of roughness. Yet we know biofouling is always patchy, hence prediction methods need an upgrade. Making a compelling business case to sh ....The effect of non-homogeneous roughness on full-scale drag predictions. Partnering with AkzoNobel, one of the world’s leading suppliers of anti-fouling marine coatings, this project will deliver new tools for predicting the drag penalty on ships fouled by the settlement of marine organisms on the hull. All available predictions assume a homogeneous distribution of roughness. Yet we know biofouling is always patchy, hence prediction methods need an upgrade. Making a compelling business case to ship operators is contingent on such predictions, where the cost of anti-fouling solutions is weighed against that of continued operation with a rough hull. The novel tools developed here will therefore lead to increased ship efficiency by empowering ship operators to optimise hull cleaning and repainting schedules.
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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE180100203
Funder
Australian Research Council
Funding Amount
$956,700.00
Summary
Novel diagnostics capabilities in reacting, particle-laden flows. This project aims to establish innovative capabilities for advanced diagnostics techniques to be applied in reacting, particle-laden flows over a range of pressures. The complementary measurements are expected to provide an unprecedented understanding of the dynamics of liquid fragments and solid particles in flames. The resulting data, and improved knowledge, will set the framework for more effective predictive methods that assis ....Novel diagnostics capabilities in reacting, particle-laden flows. This project aims to establish innovative capabilities for advanced diagnostics techniques to be applied in reacting, particle-laden flows over a range of pressures. The complementary measurements are expected to provide an unprecedented understanding of the dynamics of liquid fragments and solid particles in flames. The resulting data, and improved knowledge, will set the framework for more effective predictive methods that assist in the design of cleaner and efficient processes that benefit a range of applications, from engine design to the generation of new fuels, and the flame synthesis of novel materials.Read moreRead less