Solution of flow problems using unstructured grids on distributed memory platforms

Koubogiannis, DG; Poussoulidis, LC; Rovas, DV; Giannakoglou, KC

dc.contributor.author	Koubogiannis, DG	en
dc.contributor.author	Poussoulidis, LC	en
dc.contributor.author	Rovas, DV	en
dc.contributor.author	Giannakoglou, KC	en
dc.date.accessioned	2014-03-01T01:14:10Z
dc.date.available	2014-03-01T01:14:10Z
dc.date.issued	1998	en
dc.identifier.issn	0045-7825	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12904
dc.subject	Distributed Memory	en
dc.subject	Finite Element	en
dc.subject	Finite Volume	en
dc.subject	Numerical Solution	en
dc.subject	Parallel Processing	en
dc.subject	navier-stokes equation	en
dc.subject	Unstructured Grid	en
dc.subject	Unstructured Mesh	en
dc.subject	Upwind Scheme	en
dc.subject	Higher Order	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Mathematics, Interdisciplinary Applications	en
dc.subject.classification	Mechanics	en
dc.subject.other	Algorithms	en
dc.subject.other	Data storage equipment	en
dc.subject.other	Finite element method	en
dc.subject.other	Finite volume method	en
dc.subject.other	Navier Stokes equations	en
dc.subject.other	Parallel processing systems	en
dc.subject.other	Viscous flow	en
dc.subject.other	Finite volume vertex centered methods	en
dc.subject.other	Inviscid fluxes calculations	en
dc.subject.other	Monotonic extrapolation method (MUSCL)	en
dc.subject.other	Point Jacobi method	en
dc.subject.other	Steady two dimensional Euler equations	en
dc.subject.other	Unstructured meshes	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	mathematical technique	en
dc.subject.other	Navier-Stokes equations	en
dc.subject.other	mathematical method	en
dc.subject.other	Navier-Stokes equations	en
dc.title	Solution of flow problems using unstructured grids on distributed memory platforms	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0045-7825(97)00285-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0045-7825(97)00285-5	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The numerical solution of the steady two-dimensional Euler and Navier-Stokes equations using unstructured meshes with triangular elements is considered. A finite volume vertex-centered scheme is used. The Roe upwind scheme is implemented for the inviscid fluxes calculation, coupled with a monotonic extrapolation scheme (MUSCL) for higher-order accuracy. Viscous fluxes are calculated via a finite-element consistent scheme. The discretized equations are solved by means of a point-Jacobi procedure and the algorithm is ported on a distributed memory computer. The recursive spectral bisection algorithm provides patched or overlapping subdomains which are assigned to different processors. Overlapping or non-overlapping subdomain solutions are compared in terms of (a) computer cost for the partitioning, (b) efficiency of the parallel processing of the flow equations and (c) susceptibility of artifices for improving speed-up.The numerical solution of the steady two-dimensional Euler and Navier-Stokes equations using unstructured meshes with triangular elements is considered. A finite volume vertex-centered scheme is used. The Roe upwind scheme is implemented for the inviscid fluxes calculation, coupled with a monotonic extrapolation scheme (MUSCL) for higher-order accuracy. Viscous fluxes are calculated via a finite-element consistent scheme. The discretized equations are solved by means of a point-Jacobi procedure and the algorithm is ported on a distributed memory computer. The recursive spectral bisection algorithm provides patched or overlapping subdomains which are assigned to different processors. Overlapping or non-overlapping subdomain solutions are compared in terms of (a) computer cost for the partitioning, (b) efficiency of the parallel processing of the flow equations and (c) susceptibility of artifices for improving speed-up.	en
heal.publisher	Elsevier Science S.A., Lausanne, Switzerland	en
heal.journalName	Computer Methods in Applied Mechanics and Engineering	en
dc.identifier.doi	10.1016/S0045-7825(97)00285-5	en
dc.identifier.isi	ISI:000075054900006	en
dc.identifier.volume	160	en
dc.identifier.issue	1-2 /2	en
dc.identifier.spage	89	en
dc.identifier.epage	100	en