Long time behaviour of an exponential integrator for a Vlasov-Poisson system with strong magnetic field

Abstract : With the aim of solving in a four dimensional phase space a multi-scale Vlasov-Poisson system, we propose in a Particle-In-Cell framework a robust time-stepping method that works uniformly when the small parameter vanishes. As an exponential integrator, the scheme is able to use large time steps with respect to the typical size of the solution's fast oscillations. In addition, we show numerically that the method has accurate long time behaviour and that it is asymptotic preserving with respect to the limiting Guiding Center system.
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https://hal.archives-ouvertes.fr/hal-00974028
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Soumis le : mardi 18 août 2015 - 11:33:18
Dernière modification le : jeudi 29 novembre 2018 - 16:52:23
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Emmanuel Frenod, Sever Adrian Hirstoaga, Mathieu Lutz, Eric Sonnendrücker. Long time behaviour of an exponential integrator for a Vlasov-Poisson system with strong magnetic field. Communications in Computational Physics, Global Science Press, 2015, 18 (2), pp.263--296. 〈10.4208/cicp.070214.160115a〉. 〈hal-00974028v2〉

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