Abstract
The generation of a vortex flow by waves on a water surface, which simulate an energy cascade in a system of gravity waves at frequencies of 3, 4, 5, and 6 Hz, has been studied experimentally. It has been found that pumping is accompanied by the propagation of waves on the surface at different angles to the fundamental mode and by a nonlinear interaction between waves resulting in the generation of new harmonics. It has been shown that large-scale flows are formed by modes of the lowest frequency of 3 Hz intersecting at acute angles. The energy distribution of the vortex motion can be described by a power-law function of the wavenumber and is independent of the energy distribution in a system of surface waves. The energy coming to large-scale vortex flows directly from the wave system is transferred to small scales. A direct rather than inverse energy flux is established in the system of vortices.
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Original Russian Text © S.V. Filatov, A.V. Orlov, M.Yu. Brazhnikov, A.A. Levchenko, 2018, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2018, Vol. 108, No. 8, pp. 549–557.
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Filatov, S.V., Orlov, A.V., Brazhnikov, M.Y. et al. Experimental Simulation of the Generation of a Vortex Flow on a Water Surface by a Wave Cascade. Jetp Lett. 108, 519–526 (2018). https://doi.org/10.1134/S0021364018200080
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DOI: https://doi.org/10.1134/S0021364018200080