Level-set method for accurate modeling of two-phase immiscible flow with moving contact lines (1708.04771v2)

Abstract: We developed a sharp interface level-set approach for two-phase immiscible flow with moving contact lines. The Cox-Voinov model is used to describe the moving contact line. A piecewise linear interface method is used to construct the signed distance function and to implement the contact angle boundary condition. Spurious currents are studied in the case of static and moving fluid interfaces, which show convergence behavior. Pressure and the surface tension force are balanced up to machine precision for static parabolic interfaces, while the velocity error decreases steadily with grid refinement when the interface is advected in a uniform flow field. The moving contact line problem is studied and validated through comparison with theory and experiments for an advancing interface and capillary rise in a tube.