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Showing 1 to 20 of 205 for “"Multiphase Flow"”.
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Unstructured finite volume algorithms for compressible multiphase flow
… research presents novel algorithms for computing flow within an unstructured, collocated, finite volume solver in the presence of non-orthogonality and compressibility in order to extend the range of problems which can be modelled with the University's in-house CFD code: PHYSICA. A new …
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Acoustic Stimulation of Multiphase Flow in Porous Media
… study the phenomenon of acoustic stimulation of multiphase flow in porous media. To model multiphase flow, we use simple geometrical configurations consisting of a periodic train of fluid droplets in both straight and constricted capillary tubes. The Navier-Stokes equations are solved via the …
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Multiphase flow and mass transport through porous media
… porous media. Such problems always involve the multiphase flow and mass transport through three phases, namely air, oil, and water. A finite element model is developed in this thesis based on the theory of multiphase flow weakly-coupled with the theory of mass transport, in a three-dimensional …
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Characterisation and simulation of bidirectional multiphase flow in tubes
The bidirectional flow reversal phenomenon results in liquid accumulation, causes significant increase in pressure drop and therefore, the pumping power. In pipelines, this poses significant problem due to the presence of slug to churn, especially in producing gas wells. To understand the …
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CFD modelling of pipe erosion under multiphase flow regimes.
… efficiency of pipe-lines and other related flow systems. Proper knowledge of the flow characteristics, particle behaviour and geometric effects is very important in the accurate prediction of erosion rates and location. This study focuses on predicting erosion under complex multiphase flow …
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Impedance Sensors for Fast Multiphase Flow Measurement and Imaging
Multiphase flow denotes the simultaneous flow of two or more physically distinct and immiscible substances and it can be widely found in several engineering applications, for instance, power generation, chemical engineering and crude oil extraction and processing. In many of those applications, …
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Numerical Simulation of Multiphase Flow in Fractured Porous Media
Fractures provide preferred paths for flow and transport in many porous media. They have a significant influence on process behavior in groundwater remediation, reservoir engineering and safety analysis for waste repositories. We present a finite volume method for the numerical solution of the …
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Lattice-Boltzmann studies of multiphase flow through porous media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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Multiphase flow and control of fluid path in microsystems
… this ability over a wide range of two-phase flow conditions, including transient ones. Enabled by the technique for complete separation of individual phases from two-phase mixtures, we show mixing of liquids by introduction of a passive gas-phase and demonstrate integration of mixing, …
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Multiphase flow through spatially periodic models of porous media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1989.
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Effective properties of multiphase flow in heterogeneous porous media
The impact of heterogeneity on multiphase fl.ow is explored using a spectral perturbation technique employing a stationary, stochastic representation of the spatial variability of soil properties. A derivation of the system's effective properties - nonwetting phase moisture content, capillary …
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Integrated Liquid/Steam Multiphase Flow Sensors for Geothermal Applications
… the use of fiber optic sensors to detect the multiphase flow. The Department of Energy (DOE) is interested in creating steam wells, and the purpose of the research is to determine the capabilities of fiber optic sensors developed by NanoSonic Inc. to operate effectively in the detection of a …
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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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Multiphase Flow Effects on Naphthenic Acid Corrosion of Carbon Steel
… naphthenic acids (NAP) which, at high velocity multiphase flow conditions, can impair the integrity of transfer lines in crude distillation units. Previous studies have shown that NAP corrosion is particularly aggressive in the presence of a liquid phase at the metal surface. Although the effect …
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Development of particle-scale simulation methods for multiphase flow study
… Boltzmann method (LBM) was employed to solve the flow field and the intra-particle transport of heat and mass. The present model was validated by comparing the numerical results with experimental data for a single biomass particle under pyrolysis conditions. The predicted evolutions of center …
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Integrated multiphase flow modeling in wellbore for downhole pressure predictions
… of various disciplines that pertain to the flow of fluids within a conduit, knowing the bottomhole flowing pressure (P_wf) and pressure profile in the wellbore are of undeniable significance. One would ask why not deploy downhole pressure gauges to obtain P_wf readings. Unfortunately, it is …
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