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arXiv 1402.1390math.AP
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半平面内线性化可压缩Navier-Stokes-Fourier方程的零粘性和热扩散率极限

Zero viscosity and thermal diffusivity limit of the linearized compressible Navier-Stokes-Fourier equations in the half plane

Yutao Ding, Ning Jiang

摘要:

研究了半平面中可压缩粘性导热流体的线性化Navier-Stokes-Fourier方程初边值问题的零粘性和导热极限。我们考虑的情况下,粘度和热扩散率收敛到零,在相同的顺序。本文首先利用多尺度分析方法,形式化地分析了带内、边界展开项的线性化Navier-Stokes-Fourier方程的近似解。然后用能量方法得到了该方程的近似解的误差项的逐点估计,从而建立了线性化Navier-Stokes-Fourier方程在零粘性和零导热极限下的一致稳定性.本文基于\cite{xy},将等熵情况下的结果推广到具有热扩散效应的一般可压缩流体。在\cite{xy}中,除了粘性层外,还出现了热层,热层与粘性层呈线性耦合。

英文摘要:

We study the zero viscosity and heat conductivity limit of an initial boundary problem for the linearized Navier-Stokes-Fourier equations of a compressible viscous and heat conducting fluid in the half plane. We consider the case that the viscosity and thermal diffusivity converge to zero at the same order. The approximate solution of the linearized Navier-Stokes-Fourier equations with inner and boundary expansion terms is analyzed formally first by multiscale analysis. Then the pointwise estimates of the error terms of the approximate solution are obtained by energy methods, thus establish the uniform stability for the linearized Navier-Stokes-Fourier equations in the zero viscosity and heat conductivity limit. This work is based on \cite{xy} and generalize the results from isentropic case to the general compressible fluid with thermal diffusive effect. Besides the viscous layer as in \cite{xy}, thermal layer appears and coupled with the viscous layer linearly.

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