Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools ....Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools and measurement techniques that will elucidate the flow-structure dynamics leading to new diagnostic and improved treatment methods. Simulating the effect of treatment on any individual will permit it to be chosen to maximise its efficacy for a problem that costs the nation an estimated $2 Billion per year in lost productivity.Read moreRead less
Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this couple ....Matched experimental observation and finite-element simulation of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the ....Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes. Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.Read moreRead less
Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to crea ....Flow-induced oscillation in flexible tubes: experimental and numerical investigation of mechanism and onset. We seek to understand when instability arises in flow over very deformable structures. This will help us to design highly flexible structures specifically either to avoid the danger of flow-induced oscillations, which may be damaging (cardiac surgery, sails, parachutes), or in other circumstances to take advantage of them as an innovative way involving no sliding-parts mechanisms to create vibration, or flow pulsation, or sound, or motion (as in swimming-pool cleaners). Confidence in designing with highly flexible tubes will allow minimal resource consumption in manufacture of products to transport fluids, and will allow design use of the flow limitation property, whereby such a tube can control flow-rate.Read moreRead less
Materials World Network for the Study of Macromolecular Ferrofluids. This work will develop an understanding that will allow us to optimise the properties of ferrofluids (magnetic liquids) to suit particular applications. Although the primary application that will be investigated is the treatment of retinal detachment, the results will be applicable to a wide range of applications including ferrofluid-based actuators, electromagnetic micropumps and fluid based valves and sealing systems. During ....Materials World Network for the Study of Macromolecular Ferrofluids. This work will develop an understanding that will allow us to optimise the properties of ferrofluids (magnetic liquids) to suit particular applications. Although the primary application that will be investigated is the treatment of retinal detachment, the results will be applicable to a wide range of applications including ferrofluid-based actuators, electromagnetic micropumps and fluid based valves and sealing systems. During the course of this work, young Australian scientists will be trained in a cross-disciplinary environment in a variety of aspects of both nano- and bio- technology that are a key part of the National Research Priority: Frontier Technologies for Building and Transforming Australian Industries.Read moreRead less
A hierarchical quantum mechanical and classical simulation of biological ion channels. I aim to develop a methodology incorporating molecular quantum
mechanics and classical Brownian mechanics in a way that can be
applied practically to large macromolecular systems, thus relating
fine structural details to experimentally measurable
properties. Specifically, I will apply this methodology to study ion
channels in which the challenge is to relate electronic and atomic
structure to the conduct ....A hierarchical quantum mechanical and classical simulation of biological ion channels. I aim to develop a methodology incorporating molecular quantum
mechanics and classical Brownian mechanics in a way that can be
applied practically to large macromolecular systems, thus relating
fine structural details to experimentally measurable
properties. Specifically, I will apply this methodology to study ion
channels in which the challenge is to relate electronic and atomic
structure to the conductance properties of the channel. Accurately
determining these relationships provides a pathway to developing cures
for many neurological, cardiac, and muscular diseases.
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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100010
Funder
Australian Research Council
Funding Amount
$720,000.00
Summary
A 5-D Correlative Imaging Platform: Combining the strengths of light and electron microscopy. This will be Australia's first dedicated five-dimensional multiphoton-microscopy platform, allowing observation of dynamic structures across different length and time scales under controlled temperatures, followed by high-resolution electron microscopy studies on the same samples. This platform will provide a unique characterisation tool to Australia's top-flight investigators, and so contribute to the ....A 5-D Correlative Imaging Platform: Combining the strengths of light and electron microscopy. This will be Australia's first dedicated five-dimensional multiphoton-microscopy platform, allowing observation of dynamic structures across different length and time scales under controlled temperatures, followed by high-resolution electron microscopy studies on the same samples. This platform will provide a unique characterisation tool to Australia's top-flight investigators, and so contribute to the nation's research priorities. It will enable: fundamental studies of cancer, neural diseases and immune disorders; the development of frontier technologies, such as smart nanomaterials, biosensors and targeted drug delivery; and applied research to help plants and soils adapt to climate variability, and to increase sustainable use of water.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0882382
Funder
Australian Research Council
Funding Amount
$245,000.00
Summary
Biophysical Characterisation Facility. The protein analysis facility will have substantial benefits for basic science and biotechnology. It will create capacity for South Australian researchers to study proteins at the biophysical level. The facility will support research projects within the designated national research priority areas of 'Frontier technologies for building and transforming Australian industries' and 'Promoting and maintaining good health
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989726
Funder
Australian Research Council
Funding Amount
$250,000.00
Summary
Nanophotonic and Microfluidic Integration Facility: a Platform for Optofluidics. Emerging 'lab on a chip' technology promises to provide low-cost, mass produced platforms for monitoring and processing of environmental and biological samples (eg. water quality and early cancer detection). These essentially fluidic platforms will require integrated photonic components to provide the vast array of optical interrogation options that are used in all modern laboratories. The proposed facility will e ....Nanophotonic and Microfluidic Integration Facility: a Platform for Optofluidics. Emerging 'lab on a chip' technology promises to provide low-cost, mass produced platforms for monitoring and processing of environmental and biological samples (eg. water quality and early cancer detection). These essentially fluidic platforms will require integrated photonic components to provide the vast array of optical interrogation options that are used in all modern laboratories. The proposed facility will enable Australian researchers to effectively integrate nano-photonic structures with engineered micro-fluidics into a single optofluidic chip. This will bring researchers in photonics and microfluidics together and will provide platforms supporting support biomedical and environmental and even fundamental physics projects.Read moreRead less
A biophotonics-based approach to the study of cell-mechanics. This study will help to promote and maintain good health. There is a connection between diseases such as arthritis and osteoporosis and cell mechanics. Our study will provide insight into cell mechanics, thereby helping to understand the pathophysiology of these diseases. The study is relevant to tissue engineering. There is ongoing research on mechanical conditioning of tissue substitutes. Understanding cell mechanics will help to op ....A biophotonics-based approach to the study of cell-mechanics. This study will help to promote and maintain good health. There is a connection between diseases such as arthritis and osteoporosis and cell mechanics. Our study will provide insight into cell mechanics, thereby helping to understand the pathophysiology of these diseases. The study is relevant to tissue engineering. There is ongoing research on mechanical conditioning of tissue substitutes. Understanding cell mechanics will help to optimise conditioning protocols, thereby improving the properties of engineered tissue.
During this study we will develop optical tools that have applications in the life sciences, in the development of advanced materials and in nanotechnology. Our project will promote Australian research in these fields.
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