The diffusive relaxation limit of non-isentropic Euler-Maxwell equations in plasmas
首发时间:2009-07-27
Abstract:This paper is concerned with non-isentropic Euler-Maxwell equations in plasmas with short momentum relaxation time. With the help of the Maxwell-type iteration, it is obtained that, as the relaxation time tends to zero, periodic initial-value problem of a certain scaled non-isentropic Euler-Maxwell equations have unique smooth solutions existing in the time interval where the corresponding classical drift-diffusion model has smooth solutions. Meanwhile, we justify a formal derivation of the latter from the former.
keywords: Non-isentropic Euler-Maxwell equations diffusive relaxation limit the Maxwell iteration energy estimates
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等离子体非等熵Euler-Maxwell方程组的扩散松弛极限
摘要:研究等离子体中非等熵Euler-Maxwell方程组的零松弛时间极限。借助Maxwell迭代和能量方法,证明了当松弛时间趋向于零时,非等熵Euler-Maxwell方程组周期初边值问题的解到相应的漂流扩散方程组周期边值问题解的收敛性。,同时,验证了从非等熵Euler-Maxwell方程组到漂流扩散方程组的形式推导。
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