Efficiency of large-scale CFD simulations on modern supercomputers using thousands of CPUS and hybrid  MPI+OPENMP parallelization

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dc.contributor	Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.contributor	Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.contributor.author	Gorobets, Andrei
dc.contributor.author	Borrell Pol, Ricard
dc.contributor.author	Trias Miquel, Francesc Xavier
dc.contributor.author	Kozubskaya, T.K.
dc.contributor.author	Oliva Llena, Asensio
dc.date	2010
dc.identifier.citation	Gorobets, A. [et al.]. Efficiency of large-scale CFD simulations on modern supercomputers using thousands of CPUS and hybrid MPI+OPENMP parallelization. A: European Conference on Computational Fluid Dynamics. "Fifth European Conference on Computational Fluid Dynamics". Lisboa: 2010, p. 1-12.
dc.identifier.citation	978-989-96778-1-4
dc.identifier.uri	http://hdl.handle.net/2117/12117
dc.language.iso	eng
dc.relation	http://www.eccomas-cfd2010.org/index.php
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Unstructured meshes
dc.subject	Computational fluid dynamics
dc.subject	Compressible flow
dc.subject	Uncompressible flow
dc.subject	Mecànica de fluids computacional
dc.title	Efficiency of large-scale CFD simulations on modern supercomputers using thousands of CPUS and hybrid MPI+OPENMP parallelization
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	This work represents an experience in using the hybrid parallel model to perform large-scale DNS. Advantages of the hybrid approach compared to the MPI-only approach are presented and discussed. The use of OpenMP in addition to MPI is demonstrated for modelling of compressible and incompressible flows using both structured and unstructured meshes. A parallel Poisson solver for incompressible flows with one periodic direction extended with the hybrid parallelization is presented. A two-level domain decomposition approach is considered for improving parallel algorithms for compressible flows. An alternative strategy with partial data replication is represented as well. Several DNS examples with mesh sizes varying from 106 to 108 control volumes are given to demonstrate e±cient usage of the upgraded algorithms. Performance tests and simulations have been carried out on several parallel systems including Marenostrum, MVS-100000 and Lomonosov supercomputers.
dc.description.abstract	Peer Reviewed

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