Application of the parareal algorithm to simulations of ELMs in ITER plasma

Samaddar, Debasmita; Coster, D. P.; Bonnin, X.; Berry, Lee A.; Elwasif, Wael R.; Batchelor, Donald B.

doi:10.1016/j.cpc.2018.08.007

Title: Application of the parareal algorithm to simulations of ELMs in ITER plasma

Journal Article · 26 September 2018 · Computer Physics Communications

DOI: https://doi.org/10.1016/j.cpc.2018.08.007 · OSTI ID:1504000

Samaddar, Debasmita ^[1];

^[2];

^[3]; Berry, Lee A. ^[4];

^[4]; Batchelor, Donald B. ^[4]

Culham Science Centre, Oxon (United Kingdom)
Max-Planck-Institut fur Plasmaphysik, Garching (Germany)
ITER Organization, St. Paul Lez Durance (France)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

This paper explores the application of the parareal algorithm to simulations of ELMs in ITER plasma. The primary focus of this research is identifying the parameters that lead to optimum performance. Since the plasma dynamics vary extremely fast during an ELM cycle, a straightforward application of the algorithm is not possible and a modification to the standard parareal correction is implemented. The size of the time chunks also have an impact on the performance and needs to be optimized. in conclusion, a computational gain of 7.8 is obtained with 48 processors to illustrate that the parareal algorithm can be successfully applied to ELM plasma.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1504000

Journal Information:: Computer Physics Communications, Vol. 235, Issue C; ISSN 0010-4655

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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