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Article Dans Une Revue Kinetic and Related Models Année : 2015

General moment system for plasmas physics based on minimum entropy principle

Résumé

In plasma physics domain, the electrons transport can be des cribed from kinetic and hydrodynamical models. Both methods prese nt disadvantages and thus cannot be considered in practical computations for Inertial Confinement Fusion (ICF). That is why we propose in this paper a new mo del which is intermediate between these two descriptions. More precise ly, the derivation of such models is based on an angular closure in the phase space a nd retains only the energy of particles as a kinetic variable. The closure of the moment system is obtained from a minimum entropy principle. The resulting continuous model is proved to satisfy fundamental properties. Moreover the m odel is discretized w.r.t the energy variable and the semi-discretized scheme i s shown to satisfy conservation properties and entropy decay.
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hal-01443250 , version 1 (22-01-2017)

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  • HAL Id : hal-01443250 , version 1

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Jessy Mallet, Stéphane Brull, Bruno Dubroca. General moment system for plasmas physics based on minimum entropy principle. Kinetic and Related Models , 2015, 8 (3). ⟨hal-01443250⟩
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