Unsteady CFD computations using vertex-centered finite volumes for unstructured grids on Graphics Processing Units

Asouti, VG; Trompoukis, XS; Kampolis, IC; Giannakoglou, KC

dc.contributor.author	Asouti, VG	en
dc.contributor.author	Trompoukis, XS	en
dc.contributor.author	Kampolis, IC	en
dc.contributor.author	Giannakoglou, KC	en
dc.date.accessioned	2014-03-01T01:37:30Z
dc.date.available	2014-03-01T01:37:30Z
dc.date.issued	2011	en
dc.identifier.issn	0271-2091	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21533
dc.subject	Computational fluid dynamics	en
dc.subject	Graphics Processing Units	en
dc.subject	Transonic buffet	en
dc.subject	Unsteady flows	en
dc.subject	Unstructured/hybrid grids	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.classification	Mathematics, Interdisciplinary Applications	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Cell-centered scheme	en
dc.subject.other	CFD computation	en
dc.subject.other	Double precision	en
dc.subject.other	Finite volume	en
dc.subject.other	Finite volume schemes	en
dc.subject.other	FORTRAN codes	en
dc.subject.other	GPU implementation	en
dc.subject.other	Graphics card	en
dc.subject.other	Graphics Processing Unit	en
dc.subject.other	Graphics processing units	en
dc.subject.other	Navier-Stokes solver	en
dc.subject.other	Programming complexity	en
dc.subject.other	Quadrilateral elements	en
dc.subject.other	Single CPU	en
dc.subject.other	Speed-ups	en
dc.subject.other	Supercritical airfoils	en
dc.subject.other	Transonic buffet	en
dc.subject.other	Unstructured grid	en
dc.subject.other	Unstructured/hybrid grids	en
dc.subject.other	Aerodynamics	en
dc.subject.other	Airfoils	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Germanium	en
dc.subject.other	Program processors	en
dc.subject.other	Unsteady flow	en
dc.subject.other	Computer graphics equipment	en
dc.title	Unsteady CFD computations using vertex-centered finite volumes for unstructured grids on Graphics Processing Units	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/fld.2352	en
heal.identifier.secondary	http://dx.doi.org/10.1002/fld.2352	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	This paper presents a Navier-Stokes solver for steady and unsteady turbulent flows on unstructured/hybrid grids, with triangular and quadrilateral elements, which was implemented to run on Graphics Processing Units (GPUs). The paper focuses on programming issues for efficiently porting the CPU code to the GPU, using the CUDA language. Compared with cell-centered schemes, the use of a vertex-centered finite volume scheme on unstructured grids increases the programming complexity since the number of nodes connected by edge to any other node might vary a lot. Thus, delicate GPU memory handling is absolutely necessary in order to maximize the speed-up of the GPU implementation with respect to the Fortran code running on a single CPU core. The developed GPU-enabled code is used to numerically study steady and unsteady flows around the supercritical airfoil OAT15A, by laying emphasis on the transonic buffet phenomenon. The computations were carried out on NVIDIA's Ge-Force GTX 285 graphics cards and speed-ups up to similar to 46x (on a single GPU, with double precision arithmetic) are reported. Copyright (C) 2010 John Wiley & Sons, Ltd.	en
heal.publisher	WILEY-BLACKWELL	en
heal.journalName	International Journal for Numerical Methods in Fluids	en
dc.identifier.doi	10.1002/fld.2352	en
dc.identifier.isi	ISI:000294220900006	en
dc.identifier.volume	67	en
dc.identifier.issue	2	en
dc.identifier.spage	232	en
dc.identifier.epage	246	en