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arXiv 1208.3002math.APmath-phmath.MP
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二维Euler方程点涡的正则化

Regularization of point vortices for the Euler equation in dimension two

Daomin Cao, Zhongyuan Liu, Juncheng Wei

摘要:

本文构造了不可压Euler方程的平稳经典解,并将其近似为奇异平稳解。该过程通过构造以下椭圆问题的解来进行[ - \ep^2 Δu=(u-q- \frac κ{2π} \ln \frac{1}{\ep})_+^p,\quad & x \in Ω,u=0,\quad & x \in \partial Ω,]其中$p>1$,$Ω\subset\mathbb{R}^2$是有界域,$q$是调和函数。证明了若$Ω$是单连通光滑区域,则对任意给定的具有相同强度$κ>0$的Kirchhoff-Routh函数$\mathcal{W}(x_1,...,x_m)$的非退化临界点,存在一个定常经典解逼近带涡量的不可压Euler方程$mκ$的定常$m$点涡解.研究了单点非零涡解的存在性和渐近性。Smets and J. Van Schaftingen(2010).

英文摘要:

In this paper, we construct stationary classical solutions of the incompressible Euler equation approximating singular stationary solutions of this equation. This procedure is carried out by constructing solutions to the following elliptic problem [ -\ep^2 Δu=(u-q-\fracκ{2π}\ln\frac{1}{\ep})_+^p, \quad & x\inΩ, u=0, \quad & x\in\partialΩ, ] where $p>1$, $Ω\subset\mathbb{R}^2$ is a bounded domain, $q$ is a harmonic function. We showed that if $Ω$ is simply-connected smooth domain, then for any given non-degenerate critical point of Kirchhoff-Routh function $\mathcal{W}(x_1,...,x_m)$ with the same strength $κ>0$, there is a stationary classical solution approximating stationary $m$ points vortex solution of incompressible Euler equations with vorticity $mκ$. Existence and asymptotic behavior of single point non-vanishing vortex solutions were studied by D. Smets and J. Van Schaftingen (2010).

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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