Spectral solver for multi-scale plasma physics simulations with dynamically adaptive number of moments
2015 (English)In: Procedia Computer Science, Elsevier, 2015, no 1, 1148-1157 p.Conference paper (Refereed)
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, 1148-1157 p.
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
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-176138DOI: 10.1016/j.procs.2015.05.284ScopusID: 2-s2.0-84939201426OAI: oai:DiVA.org:kth-176138DiVA: diva2:875874
International Conference on Computational Science, ICCS 2002, 21 April 2002 through 24 April 2002, Amsterdam
QC 201512022015-12-022015-11-022015-12-02Bibliographically approved