NDLI: Performance enhancement strategies for multi-block overset grid cfd applications

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Performance enhancement strategies for multi-block overset grid cfd applications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Djomehri, M. Jahed Biswas, Rupak
Copyright Year	2003
Description	The overset grid methodology has significantly reduced time-to-solution of highfidelity computational fluid dynamics (CFD) simulations about complex aerospace configurations. The solution process resolves the geometrical complexity of the problem domain by using separately generated but overlapping structured discretization grids that periodically exchange information through interpolation. However, high performance computations of such large-scale realistic applications must be handled efficiently on state-of-the-art parallel supercomputers. This paper analyzes the effects of various performance enhancement strategies on the parallel efficiency of an overset grid Navier-Stokes CFD application running on an SGI Origin2000 machinc. Specifically, the role of asynchronous communication, grid splitting, and grid grouping strategies are presented and discussed. Details of a sophisticated graph partitioning technique for grid grouping are also provided. Results indicate that performance depends critically on the level of latency hiding and the quality of load balancing across the processors.
File Size	1558420
Page Count	22
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030071232
Archival Resource Key	ark:/13960/t2b90705v
Language	English
Publisher Date	2003-05-15
Access Restriction	Open
Subject Keyword	Mathematical And Computer Sciences (general) Supercomputers Multiblock Grids Computational Grids Computational Fluid Dynamics Simulation Synchronism Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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