000203624 001__ 203624
000203624 005__ 20190324131556.0
000203624 022__ $$a0021-9991
000203624 0247_ $$2doi$$a10.1016/j.cpc.2018.10.012
000203624 037__ $$aARTICLE
000203624 245__ $$aProjective multiscale time-integration for electrostatic particle-in-cell methods
000203624 260__ $$c2019
000203624 269__ $$a2019
000203624 336__ $$aJournal Articles
000203624 520__ $$aThe simulation of problems in kinetic plasma physics is often challenging due to strongly coupled phenomena across multiple scales. In this work, we propose a wavelet-based coarse-grained numerical scheme, based on the framework of Equation-Free Projective Integration, for a kinetic plasma system modeled by the Vlasov–Poisson equations. A kinetic particle-in-cell (PIC) code is used to simulate the meso scale dynamics for short time intervals. This allows the extrapolation over long time-steps of the behavior of a coarse wavelet-based discretization of the system. To validate the approach and the underlying concepts, we perform two 1D1V numerical experiments: nonlinear propagation and steepening of an ion wave, and the expansion of a plasma slab in vacuum. The direct comparisons to resolved PIC simulations show good agreement. We show that the speedup of the projective integration scheme over the full particle scheme scales linearly with the system size, demonstrating efficiency while taking into account fully kinetic, non-Maxwellian effects. This suggests that the approach is potentially interesting for kinetic plasma problems with a large separation of scales.
000203624 700__ $$g242423$$aCazeaux, Paul$$0247823
000203624 700__ $$g232231$$aHesthaven, Jan S.$$0247428
000203624 773__ $$tComputer Physics Communications$$j236$$q34-50
000203624 8564_ $$uhttps://infoscience.epfl.ch/record/203624/files/MultiScalePIC_1.pdf$$zPreprint$$s1203575$$yPreprint
000203624 8564_ $$uhttps://infoscience.epfl.ch/record/203624/files/PIC%20Extrapolation%20Ver%202.pdf$$s1826247
000203624 8560_ $$fjan.hesthaven@epfl.ch
000203624 909C0 $$xU12703$$pMCSS$$mdelphine.vieira@epfl.ch$$mjan.hesthaven@epfl.ch$$0252492
000203624 909CO $$qGLOBAL_SET$$pSB$$particle$$ooai:infoscience.tind.io:203624
000203624 917Z8 $$x232231
000203624 917Z8 $$x232231
000203624 937__ $$aEPFL-ARTICLE-203624
000203624 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000203624 980__ $$aARTICLE