Improving the scalability of Elmer finite element software

Ruokolainen, J. and Raback, P. and Lyly, M. and Kozubek, T. and Vondrak, V. and Karakasis, V. and G. Goumas, and Improving the scalability of Elmer finite element software. In: UNSPECIFIED.

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Abstract

Elmer is a finite element software for the solution of multiphysical problems. In the present work some performance bottlenecks in the workflow are eliminated: In prepocessing the mesh splitting scheme is improved to allow the conservation of mesh grading for simple problems. For the solution of linear systems a preliminary FETI domain decomposition method is implemented. It utilizes a direct factorization of the local problem and an iterative method for joining the results from the subproblems. The weak scaling of FETI is shown to be nearly ideal the number of iterations staying almost fixed. For postprocessing binary output formats and a XDMF+HDF5 I/O routine are implemented. Both may be used in conjunction with parallel visualization software.

Item Type: Conference or Workshop Item (Lecture)
Subjects: finite elements
Elmer
HDF5
XDMF
multiphysics
Depositing User: Attila Debreczeni
Date Deposited: 08 Jan 2019 12:49
Last Modified: 08 Jan 2019 12:49
URI: https://materials.prace-ri.eu/id/eprint/132

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