Evaluation of level set and phase field methods in modeling two phase flow with viscosity contrast through dual-permeability porous medium

► Level set method (LSM) and phase field method (PFM) are compared. ► Different two-phase flow problems are simulated using LSM and PFM. ► PFM better captures the physical phenomena in fluid flow through porous media. ► The computational time of PFM is considerably less, compared to LSM. This work a...

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Vydáno v:International journal of multiphase flow Ročník 52; s. 22 - 34
Hlavní autoři: Akhlaghi Amiri, H.A., Hamouda, A.A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Kidlington Elsevier Ltd 01.06.2013
Elsevier
Témata:
Bubbles
Computational methods in fluid dynamics
Computer simulation
Exact sciences and technology
Flows through porous media
Fluid dynamics
Fluid flow
Fluids
Fundamental areas of phenomenology (including applications)
Level set method
Mathematical models
Media
Multiphase and particle-laden flows
Nonhomogeneous flows
Permeability
Phase field method
Physics
Running
Surface tension
Two phase flow
Viscosity
Viscosity
Surface tension
Two phase flow
Permeability
Phase field method
Level set method
Multiple deck method
Digital simulation
Immiscible fluid
Finite element method
Two-phase flow
Modelling
Mesh generation
ISSN:0301-9322, 1879-3533
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Shrnutí:► Level set method (LSM) and phase field method (PFM) are compared. ► Different two-phase flow problems are simulated using LSM and PFM. ► PFM better captures the physical phenomena in fluid flow through porous media. ► The computational time of PFM is considerably less, compared to LSM. This work assesses conservative level set method (LSM) and Cahn–Hilliard phase field method (PFM) in modeling 2D two-phase flow through porous media, based on their ability to capture different phenomena associated with the medium permeability and fluid viscosity contrasts. The assessment includes their accuracy and running time. For this purpose, a robust finite element solver (COMSOL Multiphysics™) is used here to do the computations. To start with, the main parameters of the methods including the interface thickness, mesh size and diffusion coefficient are studied. Rectangular bubble relaxation is simulated to compare the two methods in capturing the physics of the bubble evolution. The comparison is also made for a stratified two-phase flow and flow in different single pore elements. Two models are then constructed to simulate two-phase flow with viscosity contrast through complex porous media, including homogenous medium with obstacle and dual-permeability medium. Both methods are able to capture the basic phenomena; however PFM is more successful in capturing the physical details especially in complicated porous media, compared to LSM. PFM results such as pressure gradients and fluid profiles in the media are more realistic. While LSM is unsuccessful in volume conservation and modeling no-slip boundary conditions. In addition, the running times are considerably less for PFM in simulation of different scenarios.
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ISSN:0301-9322
1879-3533
DOI:10.1016/j.ijmultiphaseflow.2012.12.006