The Vortex-Wave equation with a single vortex as the limit of the Euler equation

Details The Vortex-Wave equation with a single vortex as the limit of the Euler equation The Vortex-Wave equation with a single vortex as the limit of the Euler equation

2010-09-30

arxiv.org/abs/1010.0023v1

Mathematics

Analysis of PDEs

24 pages, to appear

Scientific paper

In this article we consider the physical justification of the Vortex-Wave equation introduced by Marchioro and Pulvirenti in the case of a single point vortex moving in an ambient vorticity. We consider a sequence of solutions for the Euler equation in the plane corresponding to initial data consisting of an ambient vorticity in $L^1\cap L^\infty$ and a sequence of concentrated blobs which approach the Dirac distribution. We introduce a notion of a weak solution of the Vortex-Wave equation in terms of velocity (or primitive variables) and then show, for a subsequence of the blobs, the solutions of the Euler equation converge in velocity to a weak solution of the Vortex-Wave equation.

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