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Title:
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Hybrid MPI+OpenMP parallelization of a Navier-Stokes solver for large-scale DNS
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Author:
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Gorobets, Andrei; Trias Miquel, Francesc Xavier; Borrell Pol, Ricard; Soria Guerrero, Manel; Oliva Llena, Asensio
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
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Abstract:
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This work presents a parallel Navier-Stokes solver for the large-scale direct numerical simulation (DNS) of incompressible flows with one periodic direction. It is based on a scalable Poisson solver that combines an
FFT diagonalization with a preconditioned conjugate gradient (PCG) method and a direct Schurcomplement based method.
Modern architectures of supercomputers with
multi-core nodes motivate the use of a two-level hybrid MPI+OpenMP parallelization. The use of the more complex two-level approach has allowed to significantly extend the number of CPUs the solver can efficiently use. Here, the solver has been
successfully tested on up to 12800 CPU cores for meshes with up to 109 grid points. However, estimations based on presented results show that more than 50000 CPU cores can potentially be exploited. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica::Aplicacions informàtiques a la física i l‘enginyeria
-Àrees temàtiques de la UPC::Física::Termodinàmica::Física de la transmissió de la calor
-Direct numerical simulation
-Navier–Stokes equations
-Simulació, Mètodes de -- Models matemàtics
-Equacions de Navier-Stokes |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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