High performance multiblock multigrid parallel solver for navier-stokes equations

摘要

A high-performance multiblock multigrid parallel solver to simulate steady three-dimensional incompressibleflows around complex geometries is presented. The solver uses an artificial compressibility formulation to solve thin layer Navier-Stokes equations using a cell centered finite-volume discretization scheme. The use of non-linear multigrid scheme enhances the convergence of the solver. The parallel solver written using MPI, is cppable of handling any arbitrary block configuration and a variety of bouundary conditions. It is shown that the parallel decomposition leads to loss in convergence and t his loss can be recovered by providing additional information during the Gauss-Siedel sub-iteration. The parallel solver is shown to exhibit good performance on the IBM-SP2 and a network of SPARC-based workstations.