A mesh-dependent model for applying dynamic contact angles to VOF simulations

作者：Afkhami S^*; Zaleski S; Bussmann M

来源：Journal of Computational Physics, 2009, 228(15): 5370-5389.

DOI：10.1016/j.jcp.2009.04.027

• VOF
• Contact line
• Contact angle
• Dynamic contact angle
• Slip length

Typical VOF algorithms rely on an implicit slip that scales with mesh refinement, to allow contact lines to move along no-slip boundaries. As a result, solutions of contact line phenomena vary continuously with mesh spacing; this paper presents examples of that variation. A mesh-dependent dynamic contact angle model is then presented, that is based on fundamental hydrodynamics and serves as a more appropriate boundary condition at a moving contact line. This new boundary condition eliminates the stress singularity at the contact line; the resulting problem is thus well-posed and yields solutions that converge with mesh refinement. Numerical results are presented of a solid plate withdrawing from a fluid pool, and of spontaneous droplet spread at small capillary and Reynolds numbers. Published by Elsevier Inc.

• 出版日期2009-8-20
• 单位Virginia Tech; 美国弗吉尼亚理工大学(Virginia Tech)