Optimising UCNS3D, a High-Order finite-Volume WENO Scheme Code for arbitrary unstructured Meshes

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dc.contributor.authorPonweiser, Thomas
dc.contributor.authorTsoutsanis, Panagiotis
dc.date.accessioned2016-09-26T15:47:07Z
dc.date.available2016-09-26T15:47:07Z
dc.date.issued2016
dc.description.abstractUCNS3D is a computational-fluid-dynamics (CFD) code for the simulation of viscous flows on arbitrary unstructured meshes. It employs very high-order numerical schemes which inherently are easier to scale than lower-order numerical schemes due to the higher ratio of computation versus communication. In this white paper, we report on optimisations of the UCNS3D code implemented in the course of the PRACE Preparatory Access Type C project “HOVE” in the time frame of February to August 2016. Through the optimisation of dense linear algebra operations, in particular matrix-vector products, by formula rewriting, pre-computation and the usage of BLAS, significant speedups of the code by factors of 2 to 6 have been achieved for representative benchmark cases. Moreover, very good scalability up to the order of 10,000 CPU cores has been demonstrated.en_UK
dc.identifier.citationThomas Ponweiser and Panagiotis Tsoutsanis. Optimising UCNS3D, a High-Order finite-Volume WENO Scheme Code for arbitrary unstructured Meshes. Available online at www.prace-ri.euen_UK
dc.identifier.uriwww.prace-ri.eu
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10596
dc.language.isoenen_UK
dc.publisherPartnership for Advanced Computing in Europeen_UK
dc.subjectCFDen_UK
dc.subjectWENOen_UK
dc.subjectUnstructured meshesen_UK
dc.subjectILESen_UK
dc.subjectTurbulanceen_UK
dc.subjectRANSen_UK
dc.subjectHypersonicen_UK
dc.subjectFortranen_UK
dc.subjectMPIen_UK
dc.subjectBLASen_UK
dc.subjectMKLen_UK
dc.titleOptimising UCNS3D, a High-Order finite-Volume WENO Scheme Code for arbitrary unstructured Meshesen_UK
dc.typeReporten_UK

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