A semi-explicit parallel solver for viscous incompressible flows

Abstract

An incompressible viscous flow solver is parallelized using a database management program GPAR developed for parallel/domain decomposition. The approach presented involves subdivision of the flow domain into sub-domains called solution blocks and distribution of the solution blocks to network of computers. The equations for each block are solved in block solvers, while the information exchange between neighboring blocks is achieved via interface solvers. The data structure for communication between block and interface solvers are provided by GPAR. The incompressible flow solver is based on the fractional step method in which the momentum equations are solved explicitly while the pressure equation is solved implicitly. Results are presented illustrating the performance of the algorithms with increasing number of blocks and processors.