Mesh convergence of moving contact lines in VOF simulations

Abstract eng:
The numerical simulation of moving contact lines is complicated by the stress singularity at the contact point, which prevents results from converging in a standard way. The objective of this work is to achieve mesh convergence of moving contact line results in VOF simulations, and to assess the applicability for a wide range of capillary numbers of the numerical model proposed by Afkhami et al. [1]. Based on fundamental hydrodynamics, the numerical model serves as a new boundary condition that adapts the microscopic contact angle as the mesh is refined, eliminating the stress singularity at the contact line. Systematic computations are performed to obtain convergence of the macroscopic interface shape near the moving contact line at a solid plate withdrawing from a fluid pool.

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