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189 people work at LJLL
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103 non-permanent staff
74 Phd students
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January 2022
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2012-GdT ITER - N. Crouseille
Titre :
Décomposition micro-macro pour la construction de schémas qui préservent l’asymptotique pour les équations de Vlasov
Résumé :
Using the micro-macro decomposition introduced recently, we derive asymptotic preserving schemes for the collisional Vlasov-Poisson
equation in different asymptotics : the diffusion, the high-field or the fluid
asymptotics. The so-obtained numerical scheme are stable with respect to the
small parameter
and, at the fully discrete level, it is shown that the numerical
scheme degenerates into a consistent discretization of the continuous
asymptotic model, up to the second order of the Chapman-Enskog expansion.