3D simulations of flows with moving contact lines using a diffuse interface method: a shear-driven droplet moving on a wall
نویسندگان
چکیده
A diffuse interface method is used to simulate two-phase flows with moving contact lines in 3D. The specific numerical issue is the validation of the method regarding the dynamics of moving contact lines in 3D. In particular, we aim to use the method to extend previous (2D and/or creeping-flow) work on sheardriven motion of a droplet on a wall to the full 3D problem, accounting for inertial effects. First, the implementation of the diffuse interface method is validated using test cases of droplet deformation in shear flow and for capillary spreading of droplets. Results are presented for shear-driven droplets moving on a wall. The diffuse interface method is used to determine an apparent contact angle in droplet spreading, which is needed in a direct comparison with analytical work. The apparent contact angle will also be used in efforts to represent the contact-line motion as a relation between an apparent contact angle and the dimensionless contact-line speed.
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