分科会「非平衡現象の流体力学」(第15回)

平成27年度第2回講演会(日本航空宇宙学会関西支部分科会)

日時: 平成27年4月24日(金) 16:30-17:30
場所: 京都大学 桂キャンパスCクラスタ総合研究棟III(C3棟) 3階 b3n03室(航空宇宙工学専攻会議室)
講演: From Vlasov-Poisson to Euler for trapped particles
Prof. Julien Barre
(Laboratoire J. A. Dieudonné, Université de Nice-Sophia Antipolis, France)
要旨: Motivated by experimental studies on clouds of cold atoms, we investigate the strong interaction limit (a.k.a. “quasi neutral” limit) for a Vlasov-Poisson-Fokker-Planck equation in an external potential. We show that under certain conditions, the dynamics reduces to an incompressible fluid equation: Euler or the lake equation, depending on the external potential. We will illustrate this convergence by some direct numerical simulations of the particles system.