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A Domain-Decomposed Multi-Level Method for Adaptively Refined Cartesian Grids with Embedded BoundariesThe work presents a new method for on-the-fly domain decomposition technique for mapping grids and solution algorithms to parallel machines, and is applicable to both shared-memory and message-passing architectures. It will be demonstrated on the Cray T3E, HP Exemplar, and SGI Origin 2000. Computing time has been secured on all these platforms. The decomposition technique is an outgrowth of techniques used in computational physics for simulations of N-body problems and the event horizons of black holes, and has not been previously used by the CFD community. Since the technique offers on-the-fly partitioning, it offers a substantial increase in flexibility for computing in heterogeneous environments, where the number of available processors may not be known at the time of job submission. In addition, since it is dynamic it permits the job to be repartitioned without global communication in cases where additional processors become available after the simulation has begun, or in cases where dynamic mesh adaptation changes the mesh size during the course of a simulation. The platform for this partitioning strategy is a completely new Cartesian Euler solver tarcreted at parallel machines which may be used in conjunction with Ames' "Cart3D" arbitrary geometry simulation package.
Document ID
20020070281
Acquisition Source
Ames Research Center
Document Type
Other
Authors
Aftosmis, M. J.
(NASA Ames Research Center Moffett Field, CA United States)
Berger, M. J.
(New York Univ. New York, NY United States)
Adomavicius, G.
(New York Univ. New York, NY United States)
Nixon, David
Date Acquired
August 20, 2013
Publication Date
October 8, 1998
Subject Category
Computer Programming And Software
Meeting Information
Meeting: 14th AIAA Computational Fluid Dynamics Conference on Parallel Computing
Location: Norfolk, VA
Country: United States
Start Date: June 28, 1999
End Date: July 1, 1999
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
PROJECT: RTOP 509-10-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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