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arXiv 1206.0993math.AP
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轴对称分层Navier-Stokes方程组的无粘极限

Inviscid limit for axisymmetric stratified Navier-Stokes system

Samira Sulaiman

摘要:

本文研究三维空间中分层Navier-Stokes方程组的Cauchy问题。本文的第一部分证明了具有轴对称初值的该方程组在索伯列夫空间$s>5/2.$中存在唯一的整体解$(v_ν,ρ_ν)$,解的界关于粘性是一致的。第二部分分析了无粘极限问题。证明了分层Euler方程组的粘性解$(v_ν,ρ_ν)_{ν>0}$到解$(v,ρ)$在空间$L^{\infty}_{\text{loc}}(\RR_+; H^{s}\times H^{s-2})$中的强收敛性.

英文摘要:

This paper is devoted to the study of the Cauchy problem for the stratified Navier-Stokes system in space dimension three. In the first part of the paper, we prove the existence of a unique global solution $(v_ν,ρ_ν)$ for this system with axisymmetric initial data belonging to the Sobolev spaces $H^{s}\times H^{s-2}$ with $s>5/2.$ The bounds of the solution are uniform with respect to the viscosity. In the second part, we analyse the inviscid limit problem. We prove the strong convergence in the space $L^{\infty}_{\text{loc}}(\RR_+; H^{s}\times H^{s-2})$ of the viscous solutions $(v_ν,ρ_ν)_{ν>0}$ to the solution $(v,ρ)$ of the stratified Euler system.

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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