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Using the GeoFEST faulted region simulation system

Show simple item record Parker, Jay W. Lyzenga, Gregory A. Donnellan, Andrea Judd, Michele A. Norton, Charles D. Baker, Teresa Tisdale, Edwin R. Li, Peggy 2007-09-27T16:03:53Z 2007-09-27T16:03:53Z 2004-07-09
dc.identifier.citation 4th International Asia Pacific Economic Cooperation (APEC) Cooperation for Earthquake Simulation (ACES) Workshop, Beijing, China, July 9 - 14, 2004 en
dc.identifier.clearanceno 04-3549
dc.description.abstract GeoFEST (the Geophyical Finite Element Simulation Tool) simulates stress evolution, fault slip and plastic/elastic processes in realistic materials, and so is suitable for earthquake cycle studies in regions such as Southern California. Many new capabilities and means of access for GeoFEST are now supported. New abilities include MPI-based cluster parallel computing using automatic PYRAMID/Parmetis-based mesh partitioning, automatic mesh generation for layered media with rectangular faults, and results visualization that is integrated with remote sensing data. The parallel GeoFEST application has been successfully run on over a half-dozen computers, including Intel Xeon clusters, Itanium II and Altix machines, and the Apple G5 cluster. It is not separately optimized for different machines, but relies on good domain partitioning for load-balance and low communication, and careful writing of the parallel diagonally preconditioned conjugate gradient solver to keep communication overhead low. Demonstrated thousand-step solutions for over a million finite elements on 64 processors require under three hours, and scaling tests show high efficiency when using more than (order of) 4000 elements per processor. The source code and documentation for GeoFEST is available at no cost from Open Channel Foundation. In addition GeoFEST may be used through a browser-based portal environment available to approved users. That environment includes semi-automated geometry creation and mesh generation tools, GeoFEST, and RIVA-based visualization tools that include the ability to generate a flyover animation showing deformations and topography. Work is in progress to support simulation of a region with several faults using 16 million elements, using a strain energy metric to adapt the mesh to faithfully represent the solution in a region of widely varying strain. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 312807 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004 en
dc.subject Geophyical Finite Element Simulation Tool (GeoFEST) en
dc.subject faults en
dc.subject earthquake cycles en
dc.title Using the GeoFEST faulted region simulation system en
dc.type Preprint en

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