Implementing Contact Angle Hysteresis in Moving Mesh-Based Two-Phase Flow Numerical Simulations.

Contact angle hysteresis is a common phenomenon in nature, which also plays an important role in industrial applications. A numerical model based on the moving mesh two-phase flow method is presented for modeling contact angle hysteresis. The implementation includes a displacement-based penalty method and a state variable method. The pinning, moving, and repinning of the contact lines can be simulated. This method is robust considering both two-dimensional and three-dimensional geometries. To further demonstrate the performance of this method, a fluid-solid interaction model with a cylinder fluctuating on a water surface considering contact angle hysteresis is demonstrated.