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Using time-parallel methods for the simulation of multi-domain parabolic equations Wensch, Joerg
Description
We consider parabolic partial differential equations defined on multiple domains. These domains are coupled at the boundary by Robin boundary conditions where the region of overlap is time-dependent. The rate of change of the geometry is much faster than the time scale of heat conduction. We apply the spectral deferred correction approach as well as a splitting in slow and fast components to this type of problem. We use the PFASST concept to obtain a parallel implementation of these concepts. One basic ingredient of PFASST are the underlying spectral deferred correction methods. Spectral deferred correction (SDC) methods start from a provisional solution. Using a simpler time integrator, this provisional solution will be iteratively improved. There are several adaptions of SDC for multi-rate problems. MISDC methods treat every scale independently in the sweeper and allows to construct high-order multi-rate methods. Typically, slow processes are treated explicitly and fast processes implicitly. We adapt the idea of the MISDC methods for the coupled heat equation and treat the diffusion part implicitly, but the fast sources in an explicit manner to avoid implicit solves for the geometry. The method will be analyzed with respect to order and stability. Finally, we present numerical results.
Item Metadata
Title |
Using time-parallel methods for the simulation of multi-domain parabolic equations
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Creator | |
Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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Date Issued |
2016-11-30T10:32
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Description |
We consider parabolic partial differential equations defined on
multiple domains. These domains are coupled at the boundary by Robin
boundary conditions where the region of overlap is time-dependent. The
rate of change of the geometry is much faster than the time scale of
heat conduction. We apply the spectral deferred correction approach
as well as a splitting in slow and fast components to this type of
problem. We use the PFASST concept to obtain a parallel
implementation of these concepts. One basic ingredient of PFASST are
the underlying spectral deferred correction methods. Spectral deferred
correction (SDC) methods start from a provisional solution. Using a
simpler time integrator, this provisional solution will be iteratively
improved. There are several adaptions of SDC for multi-rate
problems. MISDC methods treat every scale independently in the sweeper
and allows to construct high-order multi-rate methods. Typically,
slow processes are treated explicitly and fast processes
implicitly. We adapt the idea of the MISDC methods for the coupled
heat equation and treat the diffusion part implicitly, but the fast
sources in an explicit manner to avoid implicit solves for the
geometry. The method will be analyzed with respect to order and
stability. Finally, we present numerical results.
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Extent |
23 minutes
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Subject | |
Type | |
File Format |
video/mp4
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Language |
eng
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Notes |
Author affiliation: Technische Universität Dresden
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Series | |
Date Available |
2017-05-15
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0347488
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URI | |
Affiliation | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Faculty
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International