Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"flow modelling"”.
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Flow modelling of scroll compressors and expanders
… This gave an excellent understanding on the flow 'inside' the machine. From the flow patterns obtained it is obvious that the scroll device behaviour appears to be excellent as compressor but not so good as an expander. This is mainly due to the huge recirculation during the filling process …
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Gas-condensate flow modelling for shale gas reservoirs.
… pore size in the shale matrix affects the gas flow which deviates from laminar Darcy flow to Knudsen flow resulting in enhanced gas permeability. Furthermore, the phase behaviour of gas-condensate fluids is affected by the high capillary pressure in the matrix causing higher condensate …
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Heterogenous motorised traffic flow modelling using cellular automata
… design of optimisation strategies for traffic flow.
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Application of evolutionary computation to open channel flow modelling
… to two different aspects of open channel flow. The first part of the work is concerned with evaluating the ability of an evolutionary algorithm to provide insight and guidance into the correct magnitude and trend of the three parameters required in order to successfully apply a quasi 2D …
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Predicting Soot Emissions with Advanced Turbulent Reacting Flow Modelling
… shape of soot particles in turbulent reacting flows are required, not only for accurate predictions related to flame characteristics but also to meet increasingly stringent regulations. Over the last decades, advances in the understanding of key processes controlling soot formation and …
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Two-phase Flow Modelling of Mud Flocs Sedimentation in Coastal Waters
… a new drag force closure into the two-phase flow model. This new drag force closure is related to the settling velocity of mud flocs affected by suspended sediment concentration (SSC). The new two-phase model is applied to the simulation of sediment suspension at EMS/Dollard estuary for two …
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Patient-specific blood flow modelling in diagnosis of coronary artery disease
… development of patient-specific coronary blood flow models in 3D and 0D domains based on coronary artery geometries reconstructed from Coronary Computed Tomography Angiography datasets (CCTA). The computed flow patterns extend the diagnostic value of CCTA, which, being noninvasive imaging …
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Granular flow modelling of rotating drum flows using positron emission particle tracking
Tumbling mills are characterized by a flowing granular mixture comprising slurry, ore and grinding media. Akin to fluid flow, a rheological description underpinning granular flow has long been expected and pursued by many researchers. Unfortunately, no single theory has hitherto been able to …
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Managing complexity in high-concentration flow modelling aimed at hazard assessment: numerical and practical aspects
High-concentration flows are complex phenomena typical of Alpine mountain areas. Essentially, they are free-surface flows with intense sediment transport, often caused by intense rainfall events and involving large volumes of solid material. Because of the amount of sediments moved, the intense …
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Meshless Local Petrov-Galerkin method with Rankine source solution for two-dimensional two-phase flow modelling
… solution (MLPG_R) is proposed to simulate 2D flows of two immiscible fluids. The model is applicable to fluids with a wide range of density ratio from 1.01 to 1000, capable of dealing with violent flow situations (e.g. breaking waves) and maintaining the sharp discontinuity of properties of …
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Rapid Solidification of Alloy Substrates by Lasers and Electron Beams: Heat Flow Modelling and Solidification Morphology
… of this study is the development of a new heat flow model and solidification of an alloy substrate over a range of temperatures, and the verification of same with steady-state experiments on an Al-4.5 wt.% Cu alloy substrate.
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Development of a computationally efficient bubble column simulation approach by way of statistical bubble micro-flow modelling
… has lead to the establishment of three distinct modelling approaches which have been evaluated for the purpose of bubble column simulation in a number of research papers over the past two decades. Here the Euler-Euler approach has been recommended for the simulation of large scale columns, …
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Engine modelling for virtual mapping. Development of a physics based cycle-by-cycle virtual engine that can be used for cyclic engine mapping applications, engine flow modelling, ECU calibration, real-time engine control or vehicle simulation studies.
After undergoing a study about current engine modelling and mapping approaches as well as the engine modelling requirements for different applications, a major problem found to be present is the extensive and time consuming mapping procedure that every engine has to go through so that all control …
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Greenhouse Gas Mitigation and Management Strategies for Methane Reduction from Waste in Victoria, British Columbia, Canada.
… that included a literature review, material-flow modelling, and stakeholder policy analysis focused on municipal programs, the study identified the technical, behavioural, and policy interventions that are most effective in limiting methane generation across waste streams. Methane production, …
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Hydrodynamic and economic modelling of tidal current energy conversion systems.
… examines the contribution of computational modelling to the development of the tidal current energy industry, against the background of increasing commercial, government, academic and public interest. It does this through the practical application of a number of computational techniques in …
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Numerical modelling of hydrodynamic and solute transport processes in shallow water environment
This thesis studies the numerical modelling of a range of hydrodynamic, solute transport and biochemical reaction processes in shallow water environment, combining both Euler and Lagrangian techniques. The research consists of two parts: the rapid flow modelling and the solute transport modelling. …
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Multi-scale computational modeling of coronary blood flow: application to fractional flow reserve.
Introduction. Fractional flow reserve (FFR) is presently an invasive coronary clinical index. Non-invasive CT imaging combined with computational coronary flow modelling may reduce the patient’s burden of undergoing invasive testing. Research statement. The ability to obtain information of the …
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Stable and high order accurate finite difference method for the incompressible laminar boundary layer equations
Numerical simulations of incompressible flows are unequivocally important due to their numerous industrial applications. These applications ranges from the large-scale fluid's flow modelling such as aerodynamics [1], atmospheric-ocean modelling [2] to a simple pipe flows in the petroleum industry …
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3 dimensional flow and thermal modelling of the friction stir welding process
… is the localised deformation and material flow around the FSW tool. Various authors have used analytical and numerical thermal models to predict the weld microstructure and residual stress and distortion. However these models have not yet been able to predict the conditions whereby a …
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Turbulent mixing of unpremixed reactants in stirred tanks.
… been made for both reacting and non-reacting flows. For the non-reacting case, one stream was marked with a fluorescent dye; the local concentration was measured using a fluorescence technique and a bifurcated fiber optic probe of custom design. Measurements were taken at two axial-radial …
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