Improvement of the computational performance of a parallel unstructured WENO finite volume CFD code for Implicit Large Eddy Simulation

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dc.contributor.authorTsoutsanis, Panagiotis
dc.contributor.authorAntoniadis, Antonis F.
dc.contributor.authorJenkins, Karl W.
dc.date.accessioned2018-04-05T18:15:15Z
dc.date.available2018-04-05T18:15:15Z
dc.date.issued2018-03-05
dc.description.abstractIn this paper the assessment and the enhancement of the computational performance of a high-order finite volume CFD code is presented. Weighted Essentially Non-Oscillatory (WENO) schemes are considered to be from the most computationally expensive numerical frameworks, in the context of high-resolution schemes particularly on hybrid unstructured grids. The focus of this study is to assess the computational bottlenecks of the solver for the WENO schemes for Implicit Large Eddy Simulation (ILES) and optimise the performance and efficiency through a series of code modifications e.g. formula rewriting, reduction of number operations, inclusion of linear systems libraries, non-blocking communications amongst others. The code is assessed on five different HPC systems; significant speed-up is achieved ranging from 1.5 to 8.5, with very high-order schemes benefiting the most. Good scalability is also obtained up to 104 number of cores, demonstrating viability and affordability of WENO type schemes for scale resolving simulations.en_UK
dc.identifier.citationTsoutsanis P, Antoniadis AF, Jenkins KW. (2018) Improvement of the computational performance of a parallel unstructured WENO finite volume CFD code for Implicit Large Eddy Simulation. Computers and Fluids, Volume 173, September 2018, pp. 157-170en_UK
dc.identifier.cris19790396
dc.identifier.issn0045-7930
dc.identifier.urihttps://doi.org/10.1016/j.compfluid.2018.03.012
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13130
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleImprovement of the computational performance of a parallel unstructured WENO finite volume CFD code for Implicit Large Eddy Simulationen_UK
dc.typeArticleen_UK

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