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arXiv 2201.08939math.AP
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带势力的完全可压缩Navier-斯托克斯方程的最优衰减

Optimal decay of full compressible Navier-Stokes equations with potential force

Jincheng Gao, Minling Li, Zheng-an Yao

摘要:

本文研究了在$\mathbb{R}^3$中求解具有位势力的完全可压缩Navier-Stokes(CNS)方程整体解的高阶空间导数的最优衰减率.我们建立了具有位势力的CNS方程整体小解的最优衰减率及其空间导数(包括最高阶空间导数).由于所考虑的全CNS方程中存在势力,分析的困难来自于非平凡统计解的出现。这些衰减速率实际上是最佳的,因为它与线性化系统的溶液速率一致。此外,还利用时间加权能量估计、谱分析和高低频分解等方法进行了证明。

英文摘要:

In this paper, we aim to investigate the optimal decay rate for the higher order spatial derivative of global solution to the full compressible Navier-Stokes (CNS) equations with potential force in $\mathbb{R}^3$. We establish the optimal decay rate of the solution itself and its spatial derivatives (including the highest order spatial derivative) for global small solution of the full CNS equations with potential force. With the presence of potential force in the considered full CNS equations, the difficulty in the analysis comes from the appearance of non-trivial ststionary solutions. These decay rates are really optimal in the sense that it coincides with the rate of the solution of the linerized system. In addition, the proof is accomplished by virtue of time weighted energy estimate, spectral analysis, and high-low frequency decomposition.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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