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arXiv 1005.0706math.AP
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正压粘性流体临界空间整体强解的存在性

Existence of global strong solutions in critical spaces for barotropic viscous fluids

Boris Haspot

摘要:

本文致力于研究$N\geq2$维粘性可压缩正压流体。本文讨论了具有临界Besov正则性的初始值接近于常数时的整体强解的存在性问题。本文首次给出了\cite{CD}和\cite{CMZ}的最新结果,并给出了一个新的证明。我们的结果依赖于一个新的先验估计的速度,我们引入了一个新的结构,\textit{kill}之间的耦合密度和速度在\cite{H2}。我们研究一个新的变量,我们称之为有效速度.在第二次中,我们通过在初始数据上添加一些规则性来改进\cite{CD}和\cite{CMZ}的结果,特别是$ρ_{0}$在$H^{1}$中。在这种情况下,我们得到了一类关于密度和速度的大初值问题的整体强解,特别是改进了D. Hoff在\cite{5H4}中。最后,我们概括这些结果一般的粘度系数。

英文摘要:

This paper is dedicated to the study of viscous compressible barotropic fluids in dimension $N\geq2$. We address the question of the global existence of strong solutions for initial data close from a constant state having critical Besov regularity. In a first time, this article show the recent results of \cite{CD} and \cite{CMZ} with a new proof. Our result relies on a new a priori estimate for the velocity, where we introduce a new structure to \textit{kill} the coupling between the density and the velocity as in \cite{H2}. We study so a new variable that we call effective velocity. In a second time we improve the results of \cite{CD} and \cite{CMZ} by adding some regularity on the initial data in particular $ρ_{0}$ is in $H^{1}$. In this case we obtain global strong solutions for a class of large initial data on the density and the velocity which in particular improve the results of D. Hoff in \cite{5H4}. We conclude by generalizing these results for general viscosity coefficients.

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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