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Journal Articles Communications on Pure and Applied Mathematics Year : 2017

Collision of almost parallel vortex filaments


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 poly-gonial symmetry, that are perturbations of a configuration of parallel vortex filaments forming a polygon, with or without its center, rotating with constant angular velocity.
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hal-01170929 , version 1 (02-07-2015)



Valeria Banica, Erwan Faou, Evelyne Miot. Collision of almost parallel vortex filaments. Communications on Pure and Applied Mathematics, 2017, 70 (2), pp.378-405. ⟨10.1002/cpa.21637⟩. ⟨hal-01170929⟩
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