Multigrid methods for Hdiv-conforming discontinuous Galerkin methods for the Stokes equations
A multigrid method for the Stokes system discretized with an Hdiv-conforming discontinuous Galerkin method is presented. It acts on the combined velocity and pressure spaces and thus does not need a Schur complement approximation. The smoothers used are of overlapping Schwarz type and employ a local...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
07.08.2015
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| In: |
Journal of numerical mathematics
Year: 2015, Volume: 23, Issue: 1, Pages: 51-66 |
| ISSN: | 1569-3953 |
| DOI: | 10.1515/jnma-2015-0005 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1515/jnma-2015-0005 Verlag, Volltext: https://www.degruyterbrill.com/view/j/jnma.2015.23.issue-1/jnma-2015-0005/jnma-2015-0005.xml?format=INT 
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| Author Notes: | Guido Kanschat and Youli Mao |
MARC
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| 520 | |a A multigrid method for the Stokes system discretized with an Hdiv-conforming discontinuous Galerkin method is presented. It acts on the combined velocity and pressure spaces and thus does not need a Schur complement approximation. The smoothers used are of overlapping Schwarz type and employ a local Helmholtz decomposition. Additionally, we use the fact that the discretization provides nested divergence free subspaces. We present the convergence analysis and numerical evidence that convergence rates are not only independent of mesh size, but also reasonably small. | ||
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