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arXiv 1708.03225math.AP
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高雷诺数流体力学和无粘极限的注记

Remarks on high Reynolds numbers hydrodynamics and the inviscid limit

Peter Constantin, Vlad Vicol

摘要:

证明了斯托克斯方程强解序列在${\mathbb{R}}^2$的有界区域上的弱时空$L^2$粘性消失极限满足Euler方程,如果解的局部拟能是一致有界的.我们还证明了三维斯托克斯方程在有界区域上的解的$t-a.e.$弱$L^2$无粘极限是Euler方程的弱解,如果它们局部满足二阶结构函数的标度性质.所施加的条件远离边界,并且欧拉方程的野解不被先验地排除在极限之外。

英文摘要:

We prove that any weak space-time $L^2$ vanishing viscosity limit of a sequence of strong solutions of Navier-Stokes equations in a bounded domain of ${\mathbb{R}}^2$ satisfies the Euler equation if the solutions' local enstrophies are uniformly bounded. We also prove that $t-a.e.$ weak $L^2$ inviscid limits of solutions of 3D Navier-Stokes equations in bounded domains are weak solutions of the Euler equation if they locally satisfy a scaling property of their second order structure function. The conditions imposed are far away from boundaries, and wild solutions of Euler equations are not a priori excluded in the limit.

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