Parallel Solutions of Three-Dimensional Compressible Flows
Stéphane Lanteri, 06 - Valbonne (France). Unite de Recherche de Sophia-Antipolis Institut National de Recherche en Informatique et en Automatique (INRIA) · HAL (Le Centre pour la Communication Scientifique Directe) · 1995
: In this report, we present parallel solutions of realistic three-dimensional flows obtained on the Intel Paragon, the Cray T3D and the Ibm SP2 MPPs (Massively Parallel Processors). The solver under consideration is a representative subset of an existing industrial code, N3S-MUSCL (a three-dimensional compressible Navier-Stokes solver, see Chargy[3]). It implements a mixed finite element/finite volume formulation on unstructured tetrahedral meshes. Defining a good strategy for the parallelisation of an unstructured mesh based solver is a challenge, particularly when one aims at reaching a high level of performance while maintaining portability of the source code between scalar, vector and parallel machines. The parallelisation strategy adopted in this study combines mesh partitioning techniques and a message-passing programming model. The mesh partitioning algorithms and the generation of the corresponding communication data-structures are gathered in a preprocessor in order to introd...