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The ability of surface waves (gravitational or capillary) to generate horizontal vortices has been discovered in the last couple of years following the observation of 2D turbulence in thin water layers in which Faraday waves were parametrically excited [1]. Initial studies of vortices generated by quasi-standing Faraday waves [2,3] were further extended to include propagating waves [4]. The vorticity generation by waves can be used to accumulate and to store the wave energy in the stationary surface flows whose topology can be engineered by a proper choice of the boundary or by the geometry of the wave maker. In this talk I will review recent experiments on surface flow generation by waves.
1. A. von Kameke, F. Huhn, G. Fernández-García, A. P. Muñuzuri, and V. Pérez-Muñuzuri, Phys. Rev. Lett. 107, 074502 (2011). 2. N. Francois, H. Xia, H. Punzmann, and M. Shats, Phys. Rev. Lett. 110, 194501 (2013). 3. N. Francois, H. Xia, H. Punzmann, S. Ramsden, and M. Shats, Physical Review X 4, 021021 (2014). 4. H. Punzmann, N. Francois, H. Xia, G. Falkovich, and M. Shats, Nat. Phys. 10, 658-663 (2014). |