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arXiv 2502.09321math.AP
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三维正压Navier-Stokes方程的平面粘性激波与稀疏波复合波的稳定性

Stability of composite Wave of Planar Viscous Shock and Rarefaction for 3D Barotropic Navier-Stokes Equations

Jiajin Shi, Yi Wang

AI总结:

针对三维正压Navier-Stokes方程,证明了平面粘性激波与稀疏波复合波在一般小扰动下的非线性时间渐近稳定性,无需零质量条件,通过a-压缩方法得到全局强解及渐近收敛结果。

摘要:

我们证明了三维可压缩正压Navier-Stokes方程在一般扰动下(特别是无零质量条件),由平面稀疏波和平面粘性激波组成的复合波的非线性时间渐近稳定性。结果表明,若复合波强度和初始扰动适当小,三维Navier-Stokes系统存在唯一的全局时间强解,该解在时间渐近意义下收敛到对应复合波(平面粘性激波带有时变平移)。我们的证明基于带时变平移的a-压缩方法和适当的权函数。

英文摘要:

We prove the nonlinear time-asymptotic stability of the composite wave consisting of a planar rarefaction wave and a planar viscous shock for the three-dimensional (3D) compressible barotropic Navier-Stokes equations under generic perturbations, in particular, without zero-mass conditions. It is shown that if the composite wave strength and the initial perturbations are suitably small, then 3D Navier-Stokes system admits a unique global-in-time strong solution which time-asymptotically converges to the corresponding composite wave up to a time-dependent shift for planar viscous shock. Our proof is based on the $a$-contraction method with time-dependent shift and suitable weight function.

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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