An ALE method for compressible multi-material flows on unstructured grids

Abstract

The computation of compressible multi-material flows with a general equation of state is discussed using an interface tracking and moving grid approach where the material interfaces are explicitly defined as a boundary. This boundary defines two separate domains for the two separate materials. arid is represented as a double-defined points, where each point corresponds to one material. The HLLC scheme is presented and implemented in tlic context of arbitrary Lagrangian-Eiilerian formulation for solving the unsteady compressible Euler equations. The developed method is used to compute a variety of multi-component flow problems, where the equations of state can be drastically different and stiff. Numerical results demonstrate the potential of the present method for accurate simulation of multi-material flow problems. ©2003 by the authors.