On implementing the hybrid particle-level-set method on supercomputers for two-phase flow simulations

The hybrid particle-level-set method (HPLS) is an extension of the established level-set technique and allows for an efficient description of moving interfaces. With level-set methods phase interfaces are treated implicitly and hence complex shape changes as well as merging and breaking up of geometries can be handled. The HPLS-method additionally employs marker particles to improve mass-conservation properties of the classical level-set scheme. Subject of the present paper is the efficient implementation and the application to large-scale computations of this method. In simulations of two-phase flows the major part of computational operations for the multi-phase model occur in the vicinity of the interface. The implementation of these operations on parallel vector systems requires special attention. Computational results of gas bubbles rising in liquids show good agreement with the experimental data and confirm the efficiency and accuracy of the HPLS-scheme.