BRUNEAU, Charles-Henri; KHADRA, Khodor

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BRUNEAU, Charles-Henri
Modeling Enablers for Multi-PHysics and InteractionS [MEMPHIS]
Institut de Mathématiques de Bordeaux [IMB]

KHADRA, Khodor
Institut de Mathématiques de Bordeaux [IMB]

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Ce document a été publié dans

Journal of computational science. 2016, vol. 17, n° 1

Elsevier

Résumé en anglais

In order to efficiently obtain all frequencies of the solution, a multigrid solver is used to solve the Navier-Stokes equations for incompressible flows. The method uses a cell-by-cell Gauss-Seidel smoother that is not straightforwardly parallelizable. Moreover the coarsest grids are very coarse and cannot be solved in parallel. The proposed method splits the 3D Cartesian computational domain into well balanced sub-domains with respect to two dimensions. Efficient parallel procedures using MPI libraries permit us to get a high strong and weak scalability of the whole parallel software. Comparison is done between MPI and hybrid MPI/OpenMP parallelism.< Réduire

Mots clés en anglais

Multigrid solver parallelism

Gauss-Seidel smoother parallelism

Navier-Stokes equations

Strong and weak scalability

MPI and hybrid MPI/Open MP parallelism

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Highly Parallel Computing of a Multigrid Solver for 3D Navier-Stokes equations

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