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Simulation of two-phase flow with moving immersed boundaries
Mid Sweden University. (FSCN)
Mid Sweden University. (FSCN)ORCID iD: 0000-0002-1503-8293
Mid Sweden University. (FSCN)
2011 (English)In: International Journal for Numerical Methods in Fluids, ISSN 0271-2091, Vol. 67, no 12, 2062-2080 p.Article in journal (Refereed) Published
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Abstract [en]

A two-dimensional multi-phase model for immiscible binary fluid flow including moving immersed objects is presented. The fluid motion is described by the incompressible Navier-Stokes equation coupled with a phase-field model based on van der Waals’ free energy density and the Cahn-Hilliard equation. A new phase-field boundary condition was implemented with minimization of the free energy in a direct way, to specifically improve the physical behavior of the contact line dynamics for moving immersed objects. Numerical stability and execution time were significantly improved by the use of the new boundary condition. Convergence toward the analytical solution was demonstrated for equilibrium contact angle, the Lucas-Washburn theory and Stefan’s problem. The proposed model may be used for multi-phase flow problems with moving boundaries of complex geometry, such as the penetration of fluid into a deformable, porous medium.

Place, publisher, year, edition, pages
2011. Vol. 67, no 12, 2062-2080 p.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:liu:diva-125200DOI: 10.1002/fld.2484OAI: oai:DiVA.org:liu-125200DiVA: diva2:903646
Available from: 2016-02-16 Created: 2016-02-16 Last updated: 2016-02-29

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Fluid Mechanics and Acoustics

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