Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code

D. Samaddar, D. P. Coster, X. Bonnin, C. Bergmeister, E. Havlíc̆ková, L. A. Berry, W. R. Elwasif, D. B. Batchelor

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

It is shown that numerical modelling of edge plasma physics may be successfully parallelized in time. The parareal algorithm has been employed for this purpose and the SOLPS code package coupling the B2.5 finite-volume fluid plasma solver with the kinetic Monte-Carlo neutral code Eirene has been used as a test bed. The complex dynamics of the plasma and neutrals in the scrape-off layer (SOL) region makes this a unique application. It is demonstrated that a significant computational gain (more than an order of magnitude) may be obtained with this technique. The use of the IPS framework for event-based parareal implementation optimizes resource utilization and has been shown to significantly contribute to the computational gain.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalComputer Physics Communications
Volume221
DOIs
StatePublished - Dec 2017

Funding

This work has been funded within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No. 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work has been part-funded by the RCUK Energy Programme [Grant Number EP/I501045 ]. To obtain further information on the data and models underlying this paper please contact [email protected] . Also, the views and opinions expressed herein do not necessarily reflect those of the ITER Organization. The authors are also extremely thankful to the consultants at the EUROfusion Gateway cluster hosted by IPP Garching, Germany. The authors would also like to thank John Canik for providing the test case for the DIII-D simulations and Tim Hender for the valuable discussions and inputs.

Keywords

  • Edge plasma
  • Eirene
  • Magnetically confined plasmas
  • Parareal algorithm
  • SOLPS
  • Scrape off layer (SOL)
  • Time parallelization

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