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A Divergence‐free Mixture Model for Multiphase Fluids

Y. Jiang, Chenfeng Li Orcid Logo, S. Deng, S. M. Hu

Computer Graphics Forum, Volume: 39, Issue: 8, Pages: 69 - 77

Swansea University Author: Chenfeng Li Orcid Logo

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DOI (Published version): 10.1111/cgf.14102

Abstract

We present a novel divergence free mixture model for multiphase flows and the related fluid-solid coupling. The new mixture model is built upon a volume-weighted mixture velocity so that the divergence free condition is satisfied for miscible and immiscible multiphase fluids. The proposed mixture ve...

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Published in: Computer Graphics Forum
ISSN: 0167-7055 1467-8659
Published: Wiley 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa55817
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Abstract: We present a novel divergence free mixture model for multiphase flows and the related fluid-solid coupling. The new mixture model is built upon a volume-weighted mixture velocity so that the divergence free condition is satisfied for miscible and immiscible multiphase fluids. The proposed mixture velocity can be solved efficiently by adapted single phase incompressible solvers, allowing for larger time steps and smaller volume deviations. Besides, the drift velocity formulation is corrected to ensure mass conservation during the simulation. The new approach increases the accuracy of multiphase fluid simulation by several orders. The capability of the new divergence-free mixture model is demonstrated by simulating different multiphase flow phenomena including mixing and unmixing of multiple fluids, fluid-solid coupling involving deformable solids and granular materials.
Keywords: CCS Concepts; Computing methodologies → Physical simulation
College: Faculty of Science and Engineering
Issue: 8
Start Page: 69
End Page: 77

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