arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0903.0533math.AP
收藏

正压粘性流体临界空间的适定性

Well-posedness 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。我们解决了具有临界Besov正则性的{ \it large}数据的适定性问题。我们唯一的附加假设是初始密度有界远离零。这改进了\cite{DL}的分析,其中对于某些正常数$\barρ$需要小的$ρ_{0} %-\barρ$。我们的结果改进了R.丹钦的事实,我们选择的初始密度更一般的$B^{\NN}_{p,1}$与$1\leq p<+\infty$。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,杀死密度和速度之间的耦合。特别是我们的结果是第一次,我们获得的唯一性,而不施加假设的梯度密度。

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 well-posedness for {\it large} data having critical Besov regularity. %Our sole additional assumption is that %the initial density be bounded away from zero. This improves the analysis of \cite{DL} where the smallness of $ρ_{0} %-\barρ$ for some positive constant $\barρ$ was needed. Our result improve the analysis of R. Danchin by the fact that we choose initial density more general in $B^{\NN}_{p,1}$ with $1\leq p<+\infty$. Our result relies on a new a priori estimate for the velocity, where we introduce a new structure to kill the coupling between the density and the velocity. In particular our result is the first where we obtain uniqueness without imposing hypothesis on the gradient of the density.

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。

↑