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 41 for “"Multi-phase flow"”.
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Experimental Study of Multi-phase Flow Hydrodynamics in Stirring Tanks
… cells are widely used stirring tanks in phase separation where multiphase flow is involved. Flotation refers to the process in which air bubbles selectively pick up hydrophobic particles and separate them from hydrophilic solids. This technology is used throughout the mining industry as …
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A Unified Model for Multi-Phase Flow and Heat Transfer in Wellbores
<p>Multiphase flow is a common occurrence in the chemical and petroleum industries. The objective of this study was to apply the principles of multiphase flow to the production of petroleum fluids. A unified model was developed to predict the pressure profiles in wellbores using models available in …
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Experimental and Numerical Study of Multi- Phase Flow in a Coaxial Air Jet
… coaxial air jet created by shutting off the flow of propane and polymer particles to the torch head. Experimental measurements of the flow field were compared to the results of numerical simulations using different Reynolds Average Navier Stokes (RANS) models. The k-ε realizable model …
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An integrated peridynamics-finite volume based multi-phase flow, geomechanics and hydraulic fracture model
… the interaction of hydraulic fractures with multi-scale heterogeneities such as natural fractures, stress/barrier layers, bedding planes, shale laminations, and mineralogy. Moreover, hydraulic fractures originating from different clusters or stages in a multi-stage, multi-cluster treatment …
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Computational fluid dynamics modelling of multi-phase flow transition in presence of solid particles.
Multi-phase flow is the type of flow common in the oil and gas industry, as oil reservoirs contain mixtures of oil, gas and water with sand particles from sandstone reservoirs. Accurate design of oil and gas production equipment greatly depends on detailed understanding of this flow phenomena. …
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NON-DIMENSIONAL DATA-DRIVEN MODELS OF COMPUTATIONAL FLUID DYNAMICS (CFD) OF MULTI-PHASE FLOW IN ANNULUS
… to BOP malfunction or failure. To understand the flow characteristics under extreme working conditions and ultimately enable the estimation of the BOP lifetime, experimental approaches and multi-physics numerical simulations can be employed. However, the full-scale experiments are very costly, and …
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Modelling and computational analysis of heat-transfer in multi-geometry and multi-phase flow of Newtonian and non-Newtonian fluids in pipes and channels
… computationally analyzes mathematical models for multi-geometry heat exchanger design and for multi-phase flow problems involving boiling and bubble formation. Newtonian fluids, Newtonian-Fluid-Based- Nanofluids, and non-Newtonian fluids are all considered in the thesis. The Newtonian-Fluid-Based …
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Development of the Distributed Points Method with Application to Cavitating Flow
A mesh-less method for solving incompressible, multi-phase flow problems has been developed and is discussed along with the presentation of benchmark results showing good agreement with theoretical and experimental results. Results of a systematic, parametric study of the single phase flow around a …
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Machine Learning Methods and Computationally Efficient Techniques in Digital Rock Analysis
… and segmenting the minerals, and (3) performing flow simulation to obtain upscalable petrophysical parameters. Limitations exist at each step, primarily: (1) the resolution and Field of View (FOV), (2) bias and accuracy of identification and segmentation, and (3) the accuracy and computational …
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A Hybrid Dynamically Adaptive, Super-Spatio Temporal Resolution Digital Particle Image Velocimetry for Multi-Phase Flows
… with capability of resolving velocities in a multi-phase flow field, using a very sophisticated novel Dynamically Adaptive Hybrid velocity evaluation algorithm has been developed The unique methodology of this powerful system is presented, its specific distinctions are enlightened, confirming …
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Estimation of Wax Deposition in Subsea Pipelines
Developed is a multi-physics low dimensional model forecasting wax deposition rate within subsea production pipelines. This research employs experiments from 1-D and 2-D multiphase flow that have been successfully matched by a combined physics model on a closed-loop structure where the measuring …
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Double-Sided Liquid Cooling for Power Semiconductor Devices Using Embedded Power Technology
… as double-sided, forced liquid convection or multi-phase flow, can be implemented with non-wire bond packaging to improve thermal management while maintaining proper electrical performance. Embedded power is one such packaging technology, which provides a compact structure for interface of …
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Fuel spray modelling in direct-injection diesel and gasoline engines
… developed by researchers to investigate the multi-Phase flow development from high-pressure fuel injection systems for modem diesel and gasoline direct injection engines, the Eulerian-Lagrangian stochastic methodology, which models the air/vapour mixture as continuous phase and the liquid …
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Modelling the flow behaviour of gas bubbles in a bubble column
… The challenges associated with solving multi phase flow problems arise from the complexity of the governing equations which have to be solved, which are typically mass, momentum and energy balances. These time-dependent problems need to include effects of turbulence and are …
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Positron emission particle tracking applied to solid-liquid mixing in mechanically agitated vessels
… theoretical validation of Lagrangian single and multi-phase flow data obtained from tracer trajectories in mechanically agitated vessels. Whilst theoretical procedures developed here exploit a large range of mathematical and statistical concepts with Shannon entropy being an example, the …
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The Application Of Polymer Particles In Industrial Processes
… of CFD-DEM modelling to understand complex multi-phase and multi-component systems. In particular, the thesis advocates the application of the Free Surface Lattice Boltzmann Method for creating highly accurate simulations of multi-phase flow. In addition, the thesis offers opportunities for …
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Simulation and Modeling of Underground Coal Gasification Using Porous Medium Approach
… capable of incorporating the impacts of multi-disciplinary phenomena, in particular in the UCG process where there is no direct access to the developed underground reactors. Small-scale models can be used to investigate the mechanisms and details of the various phenomena taking place …
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A geo-cellular model of a multiphase hydrocarbon field incorporating fault-seal analysis : Bredasdorp Basin, South Africa
… the flexibility needed in order to manage multi-phase flow.
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Magnetorheological fluids for extreme environments : stronger, lighter, hotter
… of MR fluid valves. Investigation of fluid flow in non-uniform magnetic fields showed that in these regions the motion of the particle phase is governed by a balance between hydrodynamic and magnetophoretic forces. Finally, the flow of MR fluids in spatially-inhomogeneous magnetic and …
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