Regularity of traveling periodic stratified water waves with vorticity

Details Regularity of traveling periodic stratified water waves with vorticity Regularity of traveling periodic stratified water waves with vorticity

2012-02-15

arxiv.org/abs/1202.3225v1

Mathematics

Analysis of PDEs

25pages

Scientific paper

We prove real analyticity of all the streamlines, including the free surface, of a steady stratified flow of water over a flat bed in the absence of stagnation points, with a H\"older continuous Bernoulli function and a H\"older continuously differentiable density function. Furthermore, we show that if the Bernoulli function and the density function possess some Gevrey regularity of index s, then the stream function admits the same Gevrey regularity throughout the fluid domain; in particular if the Gevrey index s equals to 1, then we obtain analyticity of the stream function. The regularity results hold for three distinct physical regimes: capillary, capillary-gravity, and gravity water waves.

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