Symmetries and exact solutions of the rotating shallow water equations

Details Symmetries and exact solutions of the rotating shallow water equations Symmetries and exact solutions of the rotating shallow water equations

2008-08-11

arxiv.org/abs/0808.1490v1

Mathematics

Analysis of PDEs

18 pages, 4 figures

Scientific paper

Lie symmetry analysis is applied to study the nonlinear rotating shallow water equations. The 9-dimensional Lie algebra of point symmetries admitted by the model is found. It is shown that the rotating shallow water equations are related with the classical shallow water model with the change of variables. The derived symmetries are used to generate new exact solutions of the rotating shallow equations. In particular, a new class of time-periodic solutions with quasi-closed particle trajectories is constructed and studied. The symmetry reduction method is also used to obtain some invariant solutions of the model. Examples of these solutions are presented with a brief physical interpretation.

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