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Foundation ::
Finite Element Analysis ::
GeoFEST
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GeoFEST
Geophysical Finite Element Simulation Tool
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Moderators:
Greg Lyzenga
Jay Parker
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Total downloads from Open Channel to date: 158
SOURCE CODE AVAILABLE
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New version of GeoFEST available!
GeoFEST release 4.5(G) was developed in order to demonstrate and study the use of solution-driven adaptive mesh refinement (using Pyramid) in large viscoelastic finite element problems. This version was used in March 2005 to study performance of a 16 million element mesh distributed over a cluster of 490 Intel Pentium processors. In addition to allowing interested users to duplicate and extend this work, posting of the source code for this version may provide a helpful starting point for researchers interested in development of similar but different mesh-modifying versions.
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GeoFEST (Geophysical Finite Element Simulation Tool) is a two- and three-dimensional finite element software package for the modeling of solid stress and strain in geophysical and other continuum domain applications. GeoFEST uses stress-displacement finite elements to model stress and strain due to elastic static response to an earthquake event in the region of the slipping fault, the time-dependent viscoelastic relaxation, and the net effects from a series of earthquakes.
The program uses input and output in the form of formatted plain text files; the data formats can be adapted to accommodate visualization and graphically oriented i/o. The computational engine of the program employs Crout factorization for the direct inversion of the finite element matrices as well as conjugate gradient for an iterative solution option. The physics models supported by the code include isotropic linear elasticity and both Newtonian and power-law viscoelasticity, via implicit/explicit quasi-static time stepping. In addition to triangular, quadrilateral, tetrahedral and hexahedral continuum elements, the program supports split-node faulting, body forces and surface tractions. Capabilities under development include frictional faulting and buoyancy driving. Scientific applications of the code include the modeling of static and transient co- and post-seismic earth deformation, Earth response to glacial, atmospheric and hydrological loading, and other scenarios involving the bulk deformation of geologic media.
The program source is written in C, and is targeted to be compiled and run on UNIX systems, and on diverse UNIX derivatives including LINUX, HPUX, and SunOS.
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Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008 Caltech/Jet Propulsion Laboratory
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