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arXiv 1804.09503math.AP
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仅具有有界密度的粘性可压缩流体的一个适定性结果

A well-posedness result for viscous compressible fluids with only bounded density

Raphaël Danchin, Francesco Fanelli, Marius Paicu

摘要:

研究了正压可压缩Navier-斯托克斯方程仅具有有界密度解的存在唯一性。假设初始速度具有轻微的亚临界规律性,初始密度是一个正常数的小扰动(在$L^\infty$范数下),我们证明了局部时间解的存在性.在密度在光滑界面上取两个常数值的情况下(或者,更一般地说,关于某个非退化向量场族具有条纹正则性),我们得到唯一性。后者的结果补充了D. Hoff在[26]中的一个唯一性陈述,并且对任何维数$d\geq2$和一般压力定律都是有效的。

英文摘要:

We are concerned with the existence and uniqueness of solutions with only bounded density for the barotropic compressible Navier-Stokes equations. Assuming that the initial velocity has slightly sub-critical regularity and that the initial density is a small perturbation (in the $L^\infty$ norm) of a positive constant, we prove the existence of local-in-time solutions. In the case where the density takes two constant values across a smooth interface (or, more generally, has striated regularity with respect to some nondegenerate family of vector-fields), we get uniqueness. This latter result supplements the work by D. Hoff in [26] with a uniqueness statement, and is valid in any dimension $d\geq2$ and for general pressure laws.

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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