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

D. Samaddar; D. P. Coster; X. Bonnin; L. A. Berry; W. R. Elwasif; D. B. Batchelor

doi:10.1016/j.cpc.2018.08.007

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

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

Programming Systems

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

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. A computational gain of 7.8 is obtained with 48 processors to illustrate that the parareal algorithm can be successfully applied to ELM plasma.

Original language	English
Pages (from-to)	246-257
Number of pages	12
Journal	Computer Physics Communications
Volume	235
DOIs	https://doi.org/10.1016/j.cpc.2018.08.007
State	Published - Feb 2019

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 , EU 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 , United Kingdom [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 computations have been performed on the EUROfusion Gateway Cluster.

Funders	Funder number
Horizon 2020 Framework Programme
H2020 Euratom
Research Councils UK	EP/I501045
European Commission	633053

Keywords

Edge localized modes or ELMs
ITER
Magnetically confined plasmas
Parareal algorithm
SOLPS
Scrape off layer (SOL)
Time parallelization
Tokamak

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cpc.2018.08.007

Cite this

@article{d45faa94d5a54a94a5349e5c0b1a1a7e,

title = "Application of the parareal algorithm to simulations of ELMs in ITER plasma",

abstract = "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. A computational gain of 7.8 is obtained with 48 processors to illustrate that the parareal algorithm can be successfully applied to ELM plasma.",

keywords = "Edge localized modes or ELMs, ITER, Magnetically confined plasmas, Parareal algorithm, SOLPS, Scrape off layer (SOL), Time parallelization, Tokamak",

author = "D. Samaddar and Coster, {D. P.} and X. Bonnin and Berry, {L. A.} and Elwasif, {W. R.} and Batchelor, {D. B.}",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2019",

month = feb,

doi = "10.1016/j.cpc.2018.08.007",

language = "English",

volume = "235",

pages = "246--257",

journal = "Computer Physics Communications",

issn = "0010-4655",

publisher = "Elsevier",

}

TY - JOUR

T1 - Application of the parareal algorithm to simulations of ELMs in ITER plasma

AU - Samaddar, D.

AU - Coster, D. P.

AU - Bonnin, X.

AU - Berry, L. A.

AU - Elwasif, W. R.

AU - Batchelor, D. B.

PY - 2019/2

Y1 - 2019/2

N2 - 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. A computational gain of 7.8 is obtained with 48 processors to illustrate that the parareal algorithm can be successfully applied to ELM plasma.

AB - 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. A computational gain of 7.8 is obtained with 48 processors to illustrate that the parareal algorithm can be successfully applied to ELM plasma.

KW - Edge localized modes or ELMs

KW - ITER

KW - Magnetically confined plasmas

KW - Parareal algorithm

KW - SOLPS

KW - Scrape off layer (SOL)

KW - Time parallelization

KW - Tokamak

UR - http://www.scopus.com/inward/record.url?scp=85054450491&partnerID=8YFLogxK

U2 - 10.1016/j.cpc.2018.08.007

DO - 10.1016/j.cpc.2018.08.007

M3 - Article

AN - SCOPUS:85054450491

SN - 0010-4655

VL - 235

SP - 246

EP - 257

JO - Computer Physics Communications

JF - Computer Physics Communications

ER -

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

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this