The Parallel Full Approximation Scheme in Space and Time for a Parabolic Finite Element Problem
Research output: Contribution to book/Conference proceedings/Anthology/Report › Conference contribution › Contributed › peer-review
Contributors
Abstract
The parallel full approximation scheme in space and time (PFASST) is a parallel-in-time integrator that allows to integrate multiple time-steps simultaneously. It has been shown to extend scaling limits of spatial parallelization strategies when coupled with finite differences, spectral discretizations, or particle methods. In this paper we show how to use PFASST together with a finite element discretization in space. While seemingly straightforward, the appearance of the mass matrix and the need to restrict iterates as well as residuals in space makes this task slightly more intricate. We derive the PFASST algorithm with mass matrices and appropriate prolongation and restriction operators and show numerically that PFASST can, after some initial iterations, gain two orders of accuracy per iteration.
Details
Original language | English |
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Title of host publication | Domain Decomposition Methods in Science and Engineering XXVI |
Editors | Susanne C. Brenner, Axel Klawonn, Jinchao Xu, Eric Chung, Jun Zou, Felix Kwok |
Publisher | Springer, Berlin [u. a.] |
Pages | 531-538 |
Number of pages | 8 |
Publication status | Published - 16 Mar 2023 |
Peer-reviewed | Yes |
External IDs
ArXiv | 2103.09584 |
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Mendeley | fe7bec4f-4230-3bf8-8d02-3378454feaaf |
Scopus | 85151143865 |
ORCID | /0000-0003-1093-6374/work/142250580 |
Keywords
ASJC Scopus subject areas
Keywords
- parallel in time, PFASST, finite elements, parabolic equation