Singularity Formation in a Surface Wave Model

Abstract

In this paper we study the Burgers equation with a nonlocal term of the form $Hu$ where $H$ is the Hilbert transform. This system has been considered as a quadratic approximation for the dynamics of a free boundary of a vortex patch. We prove blow up in finite time for a large class of initial data with finite energy. Considering a more general nonlocal term, of the form ${\Lambda }^{\alpha }Hu$ for $0<\alpha <1$, finite time singularity formation is also shown.

14 pages

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