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| Home > Publications database > PFASST-ER: combining the parallel full approximation scheme in space and time with parallelization across the method > print |
| 001 | 885633 | ||
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| 024 | 7 | _ | |a 10.1007/s00791-020-00330-5 |2 doi |
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| 037 | _ | _ | |a FZJ-2020-03974 |
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| 100 | 1 | _ | |a Schöbel, Ruth |0 P:(DE-Juel1)169281 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a PFASST-ER: combining the parallel full approximation scheme in space and time with parallelization across the method |
| 260 | _ | _ | |a Heidelberg |c 2020 |b Springer |
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| 520 | _ | _ | |a To extend prevailing scaling limits when solving time-dependent partial differential equations, the parallel full approximation scheme in space and time (PFASST) has been shown to be a promising parallel-in-time integrator. Similar to space–time multigrid, PFASST is able to compute multiple time-steps simultaneously and is therefore in particular suitable for large-scale applications on high performance computing systems. In this work we couple PFASST with a parallel spectral deferred correction (SDC) method, forming an unprecedented doubly time-parallel integrator. While PFASST provides global, large-scale “parallelization across the step”, the inner parallel SDC method allows integrating each individual time-step “parallel across the method” using a diagonalized local Quasi-Newton solver. This new method, which we call “PFASST with Enhanced concuRrency” (PFASST-ER), therefore exposes even more temporal concurrency. For two challenging nonlinear reaction-diffusion problems, we show that PFASST-ER works more efficiently than the classical variants of PFASST and can use more processors than time-steps. |
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| 536 | _ | _ | |a PhD no Grant - Doktorand ohne besondere Förderung (PHD-NO-GRANT-20170405) |0 G:(DE-Juel1)PHD-NO-GRANT-20170405 |c PHD-NO-GRANT-20170405 |x 2 |
| 588 | _ | _ | |a Dataset connected to CrossRef |
| 700 | 1 | _ | |a Speck, Robert |0 P:(DE-Juel1)132268 |b 1 |u fzj |
| 773 | _ | _ | |a 10.1007/s00791-020-00330-5 |g Vol. 23, no. 1-4, p. 12 |0 PERI:(DE-600)1458972-2 |n 1-4 |p 12 |t Computing and visualization in science |v 23 |y 2020 |x 1432-9360 |
| 856 | 4 | _ | |y OpenAccess |u https://juser.fz-juelich.de/record/885633/files/PFASST_ER%2814%29.pdf |
| 856 | 4 | _ | |y OpenAccess |u https://juser.fz-juelich.de/record/885633/files/Sch%C3%B6bel-Speck2020_Article_PFASST-ERCombiningTheParallelF.pdf |
| 856 | 4 | _ | |y OpenAccess |x pdfa |u https://juser.fz-juelich.de/record/885633/files/PFASST_ER%2814%29.pdf?subformat=pdfa |
| 856 | 4 | _ | |y OpenAccess |x pdfa |u https://juser.fz-juelich.de/record/885633/files/Sch%C3%B6bel-Speck2020_Article_PFASST-ERCombiningTheParallelF.pdf?subformat=pdfa |
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