On the existence of extreme waves and the Stokes conjecture with vorticity

Details On the existence of extreme waves and the Stokes conjecture with vorticity On the existence of extreme waves and the Stokes conjecture with vorticity

2007-07-15

arxiv.org/abs/0707.2224v3

J. Differential Equations, 246 (2009), 4043-4076.

Mathematics

Analysis of PDEs

36 pages, main results are improved, additional material is added

Scientific paper

This is a study of singular solutions of the problem of traveling gravity water waves on flows with vorticity. We show that, for a certain class of vorticity functions, a sequence of regular waves converges to an extreme wave with stagnation points at its crests. We also show that, for any vorticity function, the profile of an extreme wave must have either a corner of $120^\circ$ or a horizontal tangent at any stagnation point about which it is supposed symmetric. Moreover, the profile necessarily has a corner of $120^\circ$ if the vorticity is nonnegative near the free surface.

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