Two-phase flow modeling combining the CICSAM with the projection method

Abstract

The DLR TAU code is enhanced with the CICSAM method for an algebraic reconstruction of the fluid interface. The incompressible module of the DLR TAU Code is cast in a finite-volume projection method infrastructure for variable density flows. The infrastructure is rebuilt such that very high density ratios, e.g. the ratio of gaseous helium and liquid hydrogen can be modelled. TAU is based on the dual-grid approach, i.e. the initial primary grid is broken down into an unstructured secondary or dual grid. Thus, TAU is applicable on a wide range of meshes. Structured, Cartesian grids can be handled as well as unstructured, tetrahedral ones. Several test cases are presented in which a very good agreement to experimental and analytical results can be seen.