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 13 of 13 for “"three phase flow"”.
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An analytical and experimental investigation of three phase flow in airlift pumps used for diamondiferous marine gravel reclamation
… an investigation on airlift pumps operating in three phase flow. The investigation is specifically geared towards offshore diamond reclamation and the three phases considered are air, water and marine gravels. The purpose of the research was to develop an analytical technique to simulate …
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Experimental and Simulation Study of Relative Permeabilities in Heavy Oil/Water/Gas Systems
… and relative permeabilities of the involved phases were determined. Athabasca bitumen was used as the oil phase and distilled water and nitrogen were used as the water and gas phases respectively. A vertical sand-pack core-holder of 1.5 inch diameter and 2 feet long was designed and …
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Evaporating cross flow spray jets in gas-solid circulating fluidized bed
Three-phase flow of solid-gas suspension with liquid spray is found in many industrial applications, including fluidized catalytic cracking in petroleum refinery process, and wet scrubbing process. This dissertation study is aimed to understand the gas-solid-liquid three-phase flow structure, phase …
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A Study of Transport of Micellar Fluids in Porous Media
Two- and three-phase relative permeabilities have been measured for a low interfacial tension brineoil- surfactant-alcohol mixture in a Berea sandstone core. The measurements were done at steady-state with a constant nominal capillary number of 10^-2. Residual phase saturation (capillary …
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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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The Application of Improved Numerical Techniques to 1-D Micellar/Polymer Flooding Simulation
Three examples of three phase flow models which have been developed are compared under various conditions. Although the dif-ference in oil recovery and surfactant trapping among the models was rather large with constant. salinity, a salinity gradient produced high oil recovery and low surfactant …
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Development of a New Parallel In-Situ Combustion Simulator
… including multi-dimensional multicomponent three-phase flow, heat convection and conduction, chemical reactions, and mass transfer between phases. In the mathematical model, different governing equations and constraints are involved, forming a complicated PDE (partial differential equation) …
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Use of computational fluid dynamics in the design of bubble column reactors
… techniques that depict the transport of discrete phases (gas bubbles or solid particles) and model biochemical reactions in a bubble column reactor are discussed here. The mixture model was used to calculate gas-liquid, solid-liquid and gasliquid-solid interactions. Multiphase flow is a difficult …
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Flow and Distribution of Water in Fractional Wettability Unsaturated Porous Media
In recent years, interest in fluid flow and transport in the unsaturated zone has gained more attention, due to growing concerns that the quality of the subsurface environment is adversely affected by agricultural, industrial, and municipal activities. The wettability properties (e.g., water …
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Ternary Flow Simulation Based on The Conservative Phase Field Lattice Boltzmann Method
… this thesis, we numerically investigated multi-phase fluid dynamics (2 and 3-phase flow) by solving the Navier-Stokes equations coupled with the conservative phase field (CPF) equations using the Lattice Boltzmann method (LBM). To effectively simulate the large-scale multi-phase physics, we …
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Modeling of non-uniform hydrodynamics and catalytic reaction in a solids-laden riser
… of riser reaction models. The local gas-solids flow structure in riser reactors is highly heterogeneous both in axial and radial direction with back-mixing of catalyst. The radial non-uniform gas-solid flow structure is presented as core-annulus regime, with up-flow of dilute suspension of fresh …
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Multiphase flow modeling and deposition of hydrates in oil and gas pipelines
Multiphase flow is a ubiquitous feature of oil and gas production and hence, all flow assurance issues involve multiphase flow. The risk of plugging due to gas hydrate formation remains one of the most prevailing flow-assurance problems in deepwater subsea oil and gas operations. Due to the …
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Multiphase flow modeling and deposition of hydrates in oil and gas pipelines
Multiphase flow is a ubiquitous feature of oil and gas production and hence, all flow assurance issues involve multiphase flow. The risk of plugging due to gas hydrate formation remains one of the most prevailing flow-assurance problems in deepwater subsea oil and gas operations. Due to the …