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Quasi-periodic solutions of the 2D Euler equation. (English) Zbl 1277.35279

Summary: We consider the two-dimensional Euler equation with periodic boundary conditions. We construct time quasi-periodic solutions of this equation made of localized travelling profiles with compact support propagating over a stationary state depending on only one variable. The direction of propagation is orthogonal to this variable, and the support is concentrated on flat strips of the stationary state. The frequencies of the solution are given by the locally constant velocities associated with the stationary state.

MSC:

35Q31 Euler equations
35B10 Periodic solutions to PDEs
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