论文标题
桥接动力学等离子体描述和单流体模型
Bridging kinetic plasma descriptions and single fluid models
论文作者
论文摘要
本文的目的是桥接动力学等离子体描述和低频单流体模型。更具体地说，研究了从Vlasov-Maxwell系统开始的导致磁动力（MHD）制度的渐近学。还概述了与电子的流体表示与电子耦合到玻尔兹曼关系的流体表示形式的类比。目的是识别解释从一个微观描述到宏观低频模型的转变的渐近参数。这些研究为衍生多尺度数值方法，模型耦合或基于物理的预处理提供了基础工作。
The purpose of this paper is to bridge kinetic plasma descriptions and low frequency single fluid models. More specifically, the asymptotics leading to Magneto-Hydro-Dynamic (MHD) regimes starting from the Vlasov-Maxwell system are investigated. The analogy with the derivation, from the Vlasov-Poisson system, of a fluid representation for the ions coupled to the Boltzmann relation for electrons is also outlined. The aim is to identify asymptotic parameters explaining the transitions from one microscopic description to a macroscopic low frequency model. These investigations provide ground work for the derivation of multi-scale numerical methods, model coupling or physics based preconditioning.
