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arXiv 2204.09799math.AP
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有边界区域内全Navier-Stokes方程组在低马赫数和无粘极限下的一致正则性

Uniform regularity in the low Mach number and inviscid limits for the full Navier-Stokes system in domains with boundaries

Changzhen Sun

摘要:

本文以低马赫数极限问题的研究为背景,在初始数据准备不充分的一般情况下,建立了光滑区域内具有Navier-Slip边界条件的非等熵可压缩Navier-Stokes方程组关于马赫数的一致正则性估计.考虑了热传导的影响,允许温度变化较大。此外,所获得的规律性估计也是均匀的雷诺数$\text{Re}\in[1,+\infty),$ Péclet数$\text{Pe}\in [1,+\infty),$提供$$\big|\frac{1}{\text{Re}}-\frac{ι_0}{\text{Pe}}\big|\lesssim \frac{1}{\text{Pe}^{\frac{1}{2}}}\frac{1}{\text{Re}},$$其中$ι_0$是一个固定的常数,独立于马赫数,雷诺数和Péclet数。大的温度变化以及两种边界层的相互作用是证明的主要障碍。

英文摘要:

In the present work, motivated by the studies on the low Mach number limit problem, we establish uniform regularity estimates with respect to the Mach number for the non-isentropic compressible Navier-Stokes system in smooth domains with Navier-slip boundary conditions, in the general case of ill-prepared initial data. The thermal conduction is taken into account and the large variation of temperature is allowed. Moreover, the obtained regularity estimates are also uniform in the Reynolds number $\text{Re}\in[1,+\infty),$ Péclet number $\text{Pe}\in [1,+\infty),$ provided $$\big|\frac{1}{\text{Re}}-\frac{ι_0}{\text{Pe}}\big|\lesssim \frac{1}{\text{Pe}^{\frac{1}{2}}}\frac{1}{\text{Re}},$$ where $ι_0$ is a fixed constant independent of the Mach number, Reynolds number, and Péclet number. The large temperature variation as well as the interactions of two kinds of boundary layers are the main obstacles to the proof.

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