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

Samaddar, Debasmita; Coster, D. P.; Bonnin, X.; Bergmeister, Christoph; Havlíc̆ková, E.; Berry, Lee Alan; Elwasif, Wael R.; Batchelor, Donald B.

doi:10.1016/j.cpc.2017.07.012

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

Abstract

We show 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.

Authors:

Samaddar, Debasmita ^[1]; Coster, D. P. ^[2]; Bonnin, X. ^[3]; Bergmeister, Christoph ^[1]; Havlíc̆ková, E. ^[4]; Berry, Lee Alan ^[5];

^[5]; Batchelor, Donald B. ^[5]

Culham Science Centre, Abingdon, Oxon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Max-Planck-Inst. fur Plasmaphysik, Garching (Germany)
Centre National de la Recherche Scientifique (CNRS), Villetaneuse (France). Laboratoire des Sciences des Procedes et des Materiaux (LSPM)
Culham Science Centre, Abingdon, Oxon (United Kingdom). Culham Centre for Fusion Energy (CCFE); ITER Organization, St. Paul Lez Durance (France)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Jul 31 00:00:00 EDT 2017

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1407738

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Computer Physics Communications

Additional Journal Information:: Journal Volume: 221; Journal Issue: C; Journal ID: ISSN 0010-4655

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 97 MATHEMATICS AND COMPUTING; Time parallelization; Parareal algorithm; Edge plasma; Scrape off layer (SOL); SOLPS; Eirene; Magnetically confined plasmas

Citation Formats


                    Samaddar, Debasmita, Coster, D. P., Bonnin, X., Bergmeister, Christoph, Havlíc̆ková, E., Berry, Lee Alan, Elwasif, Wael R., and Batchelor, Donald B. Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code.  United States: N. p., 2017. 
Web.  doi:10.1016/j.cpc.2017.07.012.

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                    Samaddar, Debasmita, Coster, D. P., Bonnin, X., Bergmeister, Christoph, Havlíc̆ková, E., Berry, Lee Alan, Elwasif, Wael R., & Batchelor, Donald B. Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code.  United States.  https://doi.org/10.1016/j.cpc.2017.07.012

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                    Samaddar, Debasmita, Coster, D. P., Bonnin, X., Bergmeister, Christoph, Havlíc̆ková, E., Berry, Lee Alan, Elwasif, Wael R., and Batchelor, Donald B. Mon .  
"Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code".  United States.  https://doi.org/10.1016/j.cpc.2017.07.012.  https://www.osti.gov/servlets/purl/1407738.

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@article{osti_1407738,

  title        = {Temporal parallelization of edge plasma simulations using the parareal algorithm and the SOLPS code},

  author       = {Samaddar, Debasmita and Coster, D. P. and Bonnin, X. and Bergmeister, Christoph and Havlíc̆ková, E. and Berry, Lee Alan and Elwasif, Wael R. and Batchelor, Donald B.},

  abstractNote = {We show 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.},

  doi          = {10.1016/j.cpc.2017.07.012},

  journal      = {Computer Physics Communications},

  number       = C,

  volume       = 221,

  place        = {United States},

  year         = {Mon Jul 31 00:00:00 EDT 2017},

  month        = {Mon Jul 31 00:00:00 EDT 2017}

}

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Works referencing / citing this record:

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journal, June 2019

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Image mapping the temporal evolution of edge characteristics in tokamaks using neural networks
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Parallel-in-time integration of Kinematic Dynamos
text, January 2019

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

Abstract

Citation Formats

Parallel-in-time molecular-dynamics simulations journal, November 2002

Parallelization in time of numerical simulations of fully-developed plasma turbulence using the parareal algorithm journal, September 2010

Mechanisms for the convergence of time-parallelized, parareal turbulent plasma simulations journal, October 2012

Scrape-Off Layer Turbulence Theory and Simulations journal, January 1998

Calculation of observable quantities using a divertor impurity interpretive code, DIVIMP journal, December 1992

Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR journal, May 2000

Particle Simulation of the Neoclassical Plasmas journal, November 2001

Bursting and large-scale intermittency in turbulent convection with differential rotation journal, October 2003

Plasma Edge Physics with B2-Eirene journal, February 2006

The EIRENE and B2-EIRENE Codes journal, February 2005

3D Edge Modeling and Island Divertor Physics journal, April 2004

Models and Numerics in the Multi-Fluid 2-D Edge Plasma Code EDGE2D/U journal, January 1994

Applications of SOLEDGE-2D code to complex SOL configurations and analysis of Mach probe measurements journal, August 2011

Divertor modelling and extrapolation to reactor conditions journal, May 2002

Chapter 4: Power and particle control journal, June 2007

Finalizing the ITER divertor design: The key role of SOLPS modeling journal, December 2011

B2-EIRENE code modelling of an island divertor journal, March 1999

Event-based parareal: A data-flow based implementation of parareal journal, July 2012

Time-decomposed parallel time-integrators: theory and feasibility studies for fluid, structure, and fluid-structure applications journal, January 2003

Toward an efficient parallel in time method for partial differential equations journal, January 2012

A Parallel Space-Time Algorithm journal, January 2012

Benchmarking of a 1D scrape-off layer code SOLF1D with SOLPS and its use in modelling long-legged divertors journal, May 2013

Simulation of tokamak edge plasma including self-consistent electric fields journal, April 2001

Reduced Physics Models in SOLPS for Reactor Scoping Studies: Reduced Physics Models in SOLPS for Reactor Scoping Studies journal, June 2016

Simulation of the Edge Plasma in Tokamaks journal, January 2004

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The Two-Mesh Grid Refinement Method for the B2 Code journal, April 2002

Accuracy and Convergence of Coupled Finite-Volume / Monte-Carlo Codes for Plasma Edge Simulations: Accuracy and Convergence of Coupled Finite-Volume / Monte-Carlo Codes for Plasma Edge Simulations journal, July 2016

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Image mapping the temporal evolution of edge characteristics in tokamaks using neural networks journal, February 2020

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Parallel-in-time molecular-dynamics simulations
journal, November 2002

Parallelization in time of numerical simulations of fully-developed plasma turbulence using the parareal algorithm
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Mechanisms for the convergence of time-parallelized, parareal turbulent plasma simulations
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Scrape-Off Layer Turbulence Theory and Simulations
journal, January 1998

Calculation of observable quantities using a divertor impurity interpretive code, DIVIMP
journal, December 1992

Simulation of the plasma-wall interaction in a tokamak with the Monte Carlo code ERO-TEXTOR
journal, May 2000

Particle Simulation of the Neoclassical Plasmas
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Bursting and large-scale intermittency in turbulent convection with differential rotation
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Plasma Edge Physics with B2-Eirene
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The EIRENE and B2-EIRENE Codes
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3D Edge Modeling and Island Divertor Physics
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Models and Numerics in the Multi-Fluid 2-D Edge Plasma Code EDGE2D/U
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Applications of SOLEDGE-2D code to complex SOL configurations and analysis of Mach probe measurements
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Finalizing the ITER divertor design: The key role of SOLPS modeling
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B2-EIRENE code modelling of an island divertor
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