Choosing the subregions in three-level frosch preconditioners

Conference paper (2021)

Authors

A. Heinlein University of Stuttgart, Institute of Applied Analysis and Numerical Simulation
Oliver Rheinbach University of Technology Bergakademie Freiberg
Friederike Röver University of Technology Bergakademie Freiberg
Affiliation
External organisation
Parallel Computing Domain Decomposition Preconditioners Trilinos Coarse Operator Mesh Partitioning Overlapping Schwarz
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Published Date

2021

Language

English

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Abstract

Different graph partitioning methods, i.e., linear partioning, parallel hypergraph (PHG) partioning, and two approaches using ParMETIS, are considered to generate an unstructured decomposition of the second-level coarse operator of three-level FROSch (Fast and Robust Overlapping Schwarz) preconditioners in the Trilinos software library. In our context, the parallel hypergraph method shows the most consistent results.