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arXiv 1712.03085math.AP
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旋转涡斑的全局分叉

Global bifurcation of rotating vortex patches

Zineb Hassainia, Nader Masmoudi, Miles H. Wheeler

摘要:

我们严格构造连续曲线的旋转涡补丁解决方案的二维欧拉方程。曲线是大的,因为当参数趋于无穷大时,在旋转坐标系中沿着流体角速度的界面的最小值变得任意小。这是一致的,与90个$^\circ$角的奇异限制补丁的约束存在[WOZ 84,Ove 86],在该角处相对流体速度为零。对于接近磁盘的解决方案,我们证明,有“猫眼”型结构的流动,并提供数值证据表明,这些结构沿着整个解决方案曲线持续存在,并与角落的形成。我们还表明,任何旋转涡补丁,边界是解析的,只要它是足够的规则。

英文摘要:

We rigorously construct continuous curves of rotating vortex patch solutions to the two-dimensional Euler equations. The curves are large in that, as the parameter tends to infinity, the minimum along the interface of the angular fluid velocity in the rotating frame becomes arbitrarily small. This is consistent with the conjectured existence [WOZ84,Ove86] of singular limiting patches with 90$^\circ$ corners at which the relative fluid velocity vanishes. For solutions close to the disk, we prove that there are "Cat's eyes"-type structures in the flow, and provide numerical evidence that these structures persist along the entire solution curves and are related to the formation of corners. We also show, for any rotating vortex patch, that the boundary is analytic as soon as it is sufficiently regular.

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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