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Title: An asymptotic preserving automatic domain decomposition method for the Vlasov–Poisson–BGK system with applications to plasmas

In this work we present an efficient strategy to deal with plasma physics simulations in which localized departures from thermodynamical equilibrium are present. The method is based on the introduction of intermediate regions which allows smooth transitions between kinetic and fluid zones. In this paper we extend Domain Decomposition techniques, obtained through dynamic coupling and buffer zones, to the study of plasmas and, moreover, we combine them with Asymptotic Preserving and Asymptotically Accurate strategies for the time integration. We use a hybrid scheme in which both kinetic and fluid descriptions are considered and coupled together while the kinetic model is solved by asymptotic preserving and accurate methods, in order to guarantee high efficiency and accuracy in all regimes. The numerical scheme is validated and its performances are analyzed by numerical simulations.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Mathematics and Computer Science, University of Ferrara (Italy)
  2. Institut de Mathématiques de Bordeaux, TALENCE cedex (France)
  3. Institut de Mathématiques de Toulouse, Toulouse (France)
Publication Date:
OSTI Identifier:
22382114
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 274; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; ASYMPTOTIC SOLUTIONS; BERNSTEIN MODE; COMPUTERIZED SIMULATION; COUPLING; EFFICIENCY; PERFORMANCE; PLASMA FLUID EQUATIONS; PLASMA SIMULATION; PLASMA WAVES