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arXiv 1909.00355math.AP
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有旋三维欧拉流中涡环的去奇异化

Desingularization of vortex rings in 3 dimensional Euler flows: with swirl

Daomin Cao, Jie Wan, Weicheng Zhan

摘要:

本文研究了三维轴对称不可压欧拉流体中有旋定常涡环的去奇异化问题。本文用变分方法在几种不同的区域构造了一个双参数定常涡环族,它构成了经典圆涡丝的去奇异化。渐近奇异涡丝的精确定位取决于涡环远场的环量和速度以及区域的几何形状。我们还讨论了这些涡的其他定性和渐近性质。

英文摘要:

We study desingularization of steady vortex rings in three-dimensional axisymmetric incompressible Euler fluids with swirl. Using the variational method, we construct a two-parameter family of steady vortex rings, which constitute a desingularization of the classical circular vortex filament, in several kinds of domains. The precise localization of the asymptotic singular vortex filament is shown to depend on the circulation and the velocity at far fields of the vortex ring and the geometry of the domains. We also discuss other qualitative and asymptotic properties of these vortices.

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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