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Spectral solver for multi-scale plasma physics simulations with dynamically adaptive number of moments
KTH, School of Computer Science and Communication (CSC), High Performance Computing and Visualization (HPCViz).
KTH, School of Computer Science and Communication (CSC), High Performance Computing and Visualization (HPCViz).
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2015 (English)In: Procedia Computer Science, Elsevier, 2015, no 1, p. 1148-1157Conference paper, Published paper (Refereed)
Abstract [en]

A spectral method for kinetic plasma simulations based on the expansion of the velocity distribution function in a variable number of Hermite polynomials is presented. The method is based on a set of non-linear equations that is solved to determine the coefficients of the Hermite expansion satisfying the Vlasov and Poisson equations. In this paper, we first show that this technique combines the fluid and kinetic approaches into one framework. Second, we present an adaptive strategy to increase and decrease the number of Hermite functions dynamically during the simulation. The technique is applied to the Landau damping and two-stream instability test problems. Performance results show 21% and 47% saving of total simulation time in the Landau and two-stream instability test cases, respectively.

Place, publisher, year, edition, pages
Elsevier, 2015. no 1, p. 1148-1157
Keywords [en]
Fluid-kinetic coupling, Plasma simulations, Spectral methods, Distribution functions, Kinetics, Plasma simulation, Spectroscopy, Vlasov equation, Adaptive strategy, Hermite expansion, Hermite functions, Hermite polynomials, Kinetic approach, Kinetic coupling, Two stream instability, Polynomials
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-176138DOI: 10.1016/j.procs.2015.05.284Scopus ID: 2-s2.0-84939201426OAI: oai:DiVA.org:kth-176138DiVA, id: diva2:875874
Conference
International Conference on Computational Science, ICCS 2002, 21 April 2002 through 24 April 2002, Amsterdam
Note

QC 20151202

Available from: 2015-12-02 Created: 2015-11-02 Last updated: 2015-12-02Bibliographically approved

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Laure, ErwinMarkidis, Stefano

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Vencels, JurisPeng, I. BoLaure, ErwinMarkidis, Stefano
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf