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arXiv 0901.3542math.AP
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半线性松弛冲击的存在性

Existence of semilinear relaxation shocks

Guy Metivier, Kevin Zumbrun

摘要:

我们建立存在急剧的衰减率和距离Chapman-Enskog近似的一类半线性弛豫系统,包括离散速度模型从玻尔兹曼和其他动力学方程的小振幅冲击剖面。我们的分析方法是基于宏观-微观分解介绍了刘和余的玻尔兹曼配置文件的研究,但适用于固定的,而不是时间演化方程。利用加权$H^s$空间中的压缩映射给出了一个简单的证明。

英文摘要:

We establish existence with sharp rates of decay and distance from the Chapman--Enskog approximation of small-amplitude shock profiles of a class of semilinear relaxation systems including discrete velocity models obtained from Boltzmann and other kinetic equations. Our method of analysis is based on the macro--micro decomposition introduced by Liu and Yu for the study of Boltzmann profiles, but applied to the stationary rather than the time-evolutionary equations. This yields a simple proof by contraction mapping in weighted $H^s$ spaces.

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