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arXiv 0907.2348math.APmath-phmath.MP
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无旋轴对称Euler- $α$方程:解的存在性、唯一性和Radon测度

Axisymmetric Euler-$α$ Equations without Swirl: Existence, Uniqueness, and Radon Measure Valued Solutions

Quansen Jiu, Dongjuan Niu, Edriss S. Titi, Zhouping Xin

摘要:

本文证明了无旋三维轴对称Euler- $α$方程(也称为Lagrangian-averaged Euler- $α$)整体弱解的存在性,只要初始未过滤速度$v_0$满足$\frac{\nabla \times v_0}{r}$是紧支撑的有限Randon测度.此外,在这种情况下,还建立了全局存在性和唯一性,提供$\frac{\nabla \times v_0}{r} \in L^p_c(\mathbb{R}^3)$与$p>{3/2}$。值得一提的是,迄今为止,对于理想不可压缩流的三维欧拉方程,还没有这样的结果。

英文摘要:

The global existence of weak solutions for the three-dimensional axisymmetric Euler-$α$ (also known as Lagrangian-averaged Euler-$α$) equations, without swirl, is established, whenever the initial unfiltered velocity $v_0$ satisfies $\frac{\nabla \times v_0}{r}$ is a finite Randon measure with compact support. Furthermore, the global existence and uniqueness, is also established in this case provided $\frac{\nabla \times v_0}{r} \in L^p_c(\mathbb{R}^3)$ with $p>{3/2}$. It is worth mention that no such results are known to be available, so far, for the three-dimensional Euler equations of ideal incompressible flows.

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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