Abstract: Level set and volume of fluid(VOF) methods for incompressible two-phase micro flows considering wall adhesion are presented. In the level set method, based on staggered MAC grid, a second-order projection method is carried out to solve 2D Navier-Stokes(N-S) equations and level set function. In the VOF method, the volume fraction of each phase in each computational cell is employed. Variables and properties of flow are computed to represent volume-averaged values. The interface between fluids is traced with solution of a continuity equation for volume fractions. Computational results are shown and compared with experimental results.

Key words: two-phase flow, level set method, volume of fluid method, contact angle, interface capture