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Nanorheology: Hydrodynamic Slip in Newtonian Fluids. Understanding fluid flow across a surface is essential to a great number of technologies. For over one hundred years it has been assumed that the layer of fluid adjacent to the solid moves with the solid, this is known as the no-slip boundary condition. Recently direct force balance measurements of aqueous Newtonian solutions have indicated the presence of boundary slip. Using a newly developed nanorheology technique we will systematically inv ....Nanorheology: Hydrodynamic Slip in Newtonian Fluids. Understanding fluid flow across a surface is essential to a great number of technologies. For over one hundred years it has been assumed that the layer of fluid adjacent to the solid moves with the solid, this is known as the no-slip boundary condition. Recently direct force balance measurements of aqueous Newtonian solutions have indicated the presence of boundary slip. Using a newly developed nanorheology technique we will systematically investigate the conditions that control boundary slip. This information will be used to quantify, model and control boundary slip, progressing the fields of microfluidics, particle deposition, and colloid stability.Read moreRead less
Enhancing Ammonium Phosphate Slurry Output from the Pre-Neutraliser Reactor via Rheological Study and Computational Fluid Dynamics (CFD) Modelling. A thorough understanding of slurry rheology is required for the design and computational fluid dynamics (CFD) simulation of slurry reactor to obtain optimal performance. A poorly designed reactor will have poor mixing, flow short circuiting and stagnant zones. This project will provide a means of characterising the ammonia phosphate slurry rheology o ....Enhancing Ammonium Phosphate Slurry Output from the Pre-Neutraliser Reactor via Rheological Study and Computational Fluid Dynamics (CFD) Modelling. A thorough understanding of slurry rheology is required for the design and computational fluid dynamics (CFD) simulation of slurry reactor to obtain optimal performance. A poorly designed reactor will have poor mixing, flow short circuiting and stagnant zones. This project will provide a means of characterising the ammonia phosphate slurry rheology on-line for WMC fertilizer plant, perform detailed rheological characterisation of the slurry with and without trace elements, and provide fluid flow behaviour within the reactor through CFD simulation. A mere 1% improvement over the current solids output of 100tonnes/hr will enhance the revenue by $2.5million/yr for WMC.Read moreRead less
A new angle on the coalescence of drops. Many processes depend on what happens when drops and/or bubbles collide with each other, or with the surfaces of other materials. Examples include inkjet printing, agricultural spraying, spray coating of paints, pharmaceutical formulation, stability of cosmetics and foodstuffs, formation of froths and foams, and flow of bubbly liquids. To control these processes, we need to understand how and why drops sometimes do and sometimes do not coalesce with each ....A new angle on the coalescence of drops. Many processes depend on what happens when drops and/or bubbles collide with each other, or with the surfaces of other materials. Examples include inkjet printing, agricultural spraying, spray coating of paints, pharmaceutical formulation, stability of cosmetics and foodstuffs, formation of froths and foams, and flow of bubbly liquids. To control these processes, we need to understand how and why drops sometimes do and sometimes do not coalesce with each other or adhere to surfaces. The knowledge gained in this project will enable improvements to be made in the efficiency of processes such as those listed above.Read moreRead less
Characterisation and Stability of Thin Electrowetting Films. Electrowetting is of importance to numerous industrial, biomedical and daily life settings such as microfluidic biopharmaceutical applications, coating technology, electronic displays, optical focusing devices, miniaturised chemical analysis systems for homeland security, etc. The work, aimed at generating an understanding of the complex hydrodynamic and physicochemical processes involved, is fundamental research having generic benefit ....Characterisation and Stability of Thin Electrowetting Films. Electrowetting is of importance to numerous industrial, biomedical and daily life settings such as microfluidic biopharmaceutical applications, coating technology, electronic displays, optical focusing devices, miniaturised chemical analysis systems for homeland security, etc. The work, aimed at generating an understanding of the complex hydrodynamic and physicochemical processes involved, is fundamental research having generic benefits to researchers in interfacial science, electrokinetics and microfluidics. The results will also be beneficial to industrial workers in providing engineering protocols for the development of these devices by identifying optimal conditions for fluid manipulation without prone-to-wear mechanical components. Read moreRead less
Optimising the Capture of Fine and Coarse Particles in Mineral Flotation. The aim of this project is to optimise the physical conditions for the capture of both fine and coarse particles by gas bubbles in flotation. The projects significance lies in the fact that fine and coarse particles represent the major economic loss of minerals in flotation. New methods to characterise the physical environment in flotation, as well as new approaches to modelling flotation will be expected outcomes of the ....Optimising the Capture of Fine and Coarse Particles in Mineral Flotation. The aim of this project is to optimise the physical conditions for the capture of both fine and coarse particles by gas bubbles in flotation. The projects significance lies in the fact that fine and coarse particles represent the major economic loss of minerals in flotation. New methods to characterise the physical environment in flotation, as well as new approaches to modelling flotation will be expected outcomes of the project.
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Evaluating modern printing inks: the behaviour of charged particles in concentrated nonaqueous colloidal dispersions. The Partner Organisation in this proposal, Research Laboratories of Australia (RLA) is a small Adelaide-based company which is at the forefront of modern colour printing technology. RLA provides liquid toners to several major international manufacturers of colour printers for use in liquid immersion development processes. This proposal will develop an instrument for characterisin ....Evaluating modern printing inks: the behaviour of charged particles in concentrated nonaqueous colloidal dispersions. The Partner Organisation in this proposal, Research Laboratories of Australia (RLA) is a small Adelaide-based company which is at the forefront of modern colour printing technology. RLA provides liquid toners to several major international manufacturers of colour printers for use in liquid immersion development processes. This proposal will develop an instrument for characterising the properties of liquid inks, enabling continual R&D improvement of RLA's products. Furthermore, the instrument can be commercialised and marketed worldwide to companies dealing with concentrated colloidal dispersions in a wide range of industries including foods, pharmaceuticals, cosmetics and surface coatings.Read moreRead less
Novel Nanomaterials for Photocatalytic Water Purification - Science and Application. Water is rapidly becoming Australia's most critical natural resource, and there is an urgent need to re-use and recycle water from domestic use (graywater) and industry, as well as utilisation of larger scale harvesting of rainwater. The outcome of this project will be a technology which can remove organic material (biological and non-biological) from water, enabling a greater range of uses of wastewater. This ....Novel Nanomaterials for Photocatalytic Water Purification - Science and Application. Water is rapidly becoming Australia's most critical natural resource, and there is an urgent need to re-use and recycle water from domestic use (graywater) and industry, as well as utilisation of larger scale harvesting of rainwater. The outcome of this project will be a technology which can remove organic material (biological and non-biological) from water, enabling a greater range of uses of wastewater. This technology will play a significant role in delivering future water security, and developing new industries involved in manufacture and export of water treatment technologies. This project directly addresses the National Priority Research area of water, and international priorities involving greater re-use and recycling of water.Read moreRead less