Gunilla Kreiss: Interface capturing methods for multi-phase flows

Gunilla Kreiss

KTH, Stockholm, Sweden

Interface capturing methods for multi-phase flows

There are 2 main categories of interface capturing methods developed for the simulation of multiphase flow, level set methods and phasefield methods. In this talk we focus on methods useful for simulating material processes such as solidification and sintering. To begin with we discuss a new conservative level set method for incompressible two-phase flow. The method is conservative in the sense that no mass is lost. In cases the inner structure and dynamics of the interface are important, for example when segregation of solutes to grain boundaries occurs, a phasefield method based on the Cahn-Hilliard theory of diffuse interfaces is more appropriate. Examples will be given wetting phenomena in fluids and diffusion controlled phase change in materials.