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arXiv 1507.00549math.AP
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几乎平行涡丝的碰撞

Collision of almost parallel vortex filaments

Valeria Banica, Erwan Faou, Evelyne Miot

摘要:

我们通过Klein,Majda和Damodaran [KMD 95]和Zakharov [Z88,Z99]提出的一个系统研究了涡丝演化过程中碰撞的发生。我们首先严格建立一对几乎平行的涡丝的存在,相反的循环,在有限的时间内的某个点碰撞。碰撞机制基于[BFM14]中描述的模型的自相似解之一。在本文的第二部分中,我们将这种结构扩展到任意数量的细丝的情况下,具有对称性,这是一个平行的涡丝形成一个多边形的配置扰动,有或没有它的中心,以恒定的角速度旋转。

英文摘要:

We investigate the occurrence of collisions in the evolution of vortex filaments through a system introduced by Klein, Majda and Damodaran [KMD95] and Zakharov [Z88,Z99]. We first establish rigorously the existence of a pair of almost parallel vortex filaments, with opposite circulation, colliding at some point in finite time. The collision mechanism is based on the one of the self-similar solutions of the model, described in [BFM14]. In the second part of this paper we extend this construction to the case of an arbitrary number of filaments, with polygonial symmetry, that are perturbations of a configuration of parallel vortex filaments forming a polygon, with or without its center, rotating with constant angular velocity.

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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