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 9 of 9 for “"Single phase flows"”.
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Modelling and analysis of vibrations in flexible cylinders subjected to internal multiphase and external single-phase flows.
… straight cylinders subjected to internal two-phase slug flows and external vortex-induced vibrations (VIV) by taking into account the geometric and hydrodynamic nonlinearities. Flow-induced vibration (FIV) is a common phenomenon observed in various engineering systems such as heat exchangers, …
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Fluid-structural interaction effects on vibrations of pipework.
… interactions are formulated with extensions from single phase flows to two phase annular flows. The equivalence of the annular flow to the single phase is discussed. With reference to the experimental findings, the fluid damping effect is investigated. Related damping theories are examined and new …
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Physical modelling of colloidal slurry flows
… Fuso silica spheres (0.8pm) form the dispersed phase of the suspension, and KN03, KCI electrolytes the continuous phase. The strength of the particle-particle interaction is significantly influenced by the electrolyte concentration. An increase in the electrolyte concentration from 10 4M to IM …
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The measurement of the velocities of particles in an air-solid flow
Theoretical investigations of two-phase flows have not so far produced a useful model since the interdependence of the many variables has been difficult to predict. Progress towards such a model is dependent on accurate experimental work on two-phase flows. Particle velocity is an especially …
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Heat Transfer and Hydrodynamics of Miscible/Immiscible Systems in Microchannel Devices
… Furthermore, while it has been proven that multiphase flows can lead to better heat transfer enhancement, most studies in the literature on flow in microchannels are on single-phase flows. In this research, and with a focus on the microchannel devices, the heat transfer enhancement and the …
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Improved Modeling of Unsteady Free Surface, Pressurized and Mixed Flows in Storm-Sewer Systems
… the methods available for simulating unsteady flows in closed conduits ranging from free surface flows, to partly free surface-partly pressurized flows (mixed flows), to fully pressurized flows. Two fully-conservative, computationally efficient and robust models are formulated in this thesis. …
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CFD modelling of flow-induced vibration under multiphase flow regimes.
Internal multiphase flow-induced vibration (MFIV) in pipe bends poses serious problems in oil and gas, nuclear and chemical flow systems. The problems include: high amplitude displacement of the pipe structure due to resonance; fatigue failure due to excessive cyclic stress, induced by fluctuating …
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CFD modelling of pipe erosion under multiphase flow regimes.
… focuses on predicting erosion under complex multiphase flow conditions with emphasis on double bend geometries. The Eulerian Multifluid-VOF coupled with the Lagrangian Discrete Phase Model (DPM) has been employed to account for the flow and particle behaviour, RNG k - e model for the effects of …
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Anti-fouling interfaces for energy applications
… fouling performance in a flow-fouling setup with single-phase flow of synthetic seawater. The seawater consists of saturated calcium sulfide (CaSO4), and fouling characterized in both laminar, transient and turbulent flow regimes (Reynolds numbers 1,030 to 9,300). Our coating demonstrates a …