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A density-scaled continuum surface force model within abalanced force formulation
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DOI：10.1016/j.jcp.2014.08.034.png)
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Abstract
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We propose a numerical framework which can simulate free surface flows with complex moving interfaces like droplet splashing as minimizing spurious currents. The numerical framework is based on the CLSVOF (coupled level set and volume-of-fluid) method, the THINC/WLIC (tangent of hyperbola for interface capturing/weighted line interface calculation) scheme, multi-moment methods (CIP-CSL and VSIAM3) and density-scaled CSF (continuum surface force) model within a balanced force formulation. In this paper, we propose a level set based algorithm of the density-scaled balanced CSF model and show that the density-scaled balanced CSF model can reduce spurious currents more than the standard balanced CSF model without using the density-scaling when the exact curvature is not given. We also show that the numerical framework can well capture the physics of droplet splashing. (C) 2014 Elsevier Inc. All rights reserved.
Keywords:
CSF model
Density-scaling
CLSVOF method
Surface tension
Droplet splashing
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