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 2108.09425math.AP
收藏

考虑真空的等熵可压缩Navier-斯托克斯方程的能量相等性

Energy equality in the isentropic compressible Navier-Stokes equations allowing vacuum

Yulin Ye, Yaniqng Wang, Wei Wei

摘要:

众所周知,不可压Navier-Stokes方程组在$L^4 (0,T; L^4(Ω))$中的Leray-Hopf弱解是能量持久的,这是Lions [19]的结果。本文证明了Lions的能量平衡条件在适当的密度及其导数的可积性条件下,对允许真空的等熵可压缩Navier-斯托克斯方程的弱解也是有效的。这使我们能够建立各种充分条件,暗示能量相等的可压缩流动以及非均匀不可压缩Navier-斯托克斯方程。这是Yu在[32,Arch. Ration.机械分析:225(2017)],我们的标准通过速度的梯度部分回答了梁在[18,Proc. Roy. A节(2020)]。

英文摘要:

It is well-known that a Leray-Hopf weak solution in $L^4 (0,T; L^4(Ω))$ for the incompressible Navier-Stokes system is persistence of energy due to Lions [19]. In this paper, it is shown that Lions's condition for energy balance is also valid for the weak solutions of the isentropic compressible Navier-Stokes equations allowing vacuum under suitable integrability conditions on the density and its derivative. This allows us to establish various sufficient conditions implying energy equality for the compressible flow as well as the non-homogenous incompressible Navier-Stokes equations. This is an improvement of corresponding results obtained by Yu in [32, Arch. Ration. Mech. Anal., 225 (2017)], and our criterion via the gradient of the velocity partially answers a question posed by Liang in [18, Proc. Roy. Soc. Edinburgh Sect. A (2020)].

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。

↑