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A new multigrid for...
A new multigrid formulation for high order finite difference methods on summation-by-parts form
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- Ruggiu, Andrea Alessandro (author)
- Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten
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- Weinerfelt, Per, 1958- (author)
- Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten,Saab Aerospace
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- Nordström, Jan, 1953- (author)
- Linköpings universitet,Beräkningsmatematik,Tekniska fakulteten
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(creator_code:org_t)
- Linköping : Linköping University Electronic Press, 2017
- English 32 s.
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Series: LiTH-MAT-R, 0348-2960 ; 2017:08
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Abstract
Subject headings
Close
- Multigrid schemes for high order finite difference methods on summation-by-parts form are studied by comparing the effect of different interpolation operators. By using the standard linear prolongation and restriction operators, the Galerkin condition leads to inaccurate coarse grid discretizations. In this paper, an alternative class of interpolation operators that bypass this issue and preserve the summation-by-parts property on each grid level is considered. Clear improvements of the convergence rate for relevant model problems are achieved.
Subject headings
- NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
Keyword
- High order finite difference methods
- summation-by-parts
- multigrid
- restriction and prolongation operators
- convergence acceleration
Publication and Content Type
- vet (subject category)
- rap (subject category)
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