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Title:

A new smoothed aggregation multigrid method for anisotropic problems

Document type:
Zeitschriftenaufsatz
Author(s):
Gee, M.W.; Hu, J.J.; Tuminaro, R.S.
Abstract:
A new prolongator is proposed for smoothed aggregation (SA) multigrid. The proposed prolongator addresses a limitation of standard SA when it is applied to anisotropic problems. For anisotropic problems, it is fairly standard to generate small aggregates (used to mimic semi-coarsening) in order to coarsen only in directions of strong coupling. Although beneficial to convergence, this can lead to a prohibitively large number of non-zeros in the standard SA prolongator and the corresponding coarse...     »
Keywords:
AMG, multigrid, algebraic multigrid, smoothed aggregation, anisotropy
Dewey Decimal Classification:
620 Ingenieurwissenschaften
Journal title:
Numerical Linear Algebra with Applications
Year:
2009
Journal volume:
16
Journal issue:
1
Pages contribution:
19-37
Reviewed:
ja
Language:
en
Fulltext / DOI:
doi:10.1002/nla.593
Status:
Verlagsversion / published
Semester:
SS 08
Format:
Text
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