Abstract—
The problem of absorption by a resonator of a gravity wave that propagates on the surface of an incompressible fluid is solved. The resonator is small as compared with the wavelength. For the free fluid surface the resonance, i.e., maximally possible, absorption cross-sections of resonators of various types are found. It is shown that the resonance absorption cross-section depends only on the wavelength. The problem of absorption of a gravity wave propagating in a channel is also considered. It is shown that the joint usage of monopole and dipole resonators ensures the total absorption of wave energy in the channel whose width is not greater than the wavelength.
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Translated by E.A.Pushkar
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Kanev, N.G., Mironov, M.A. Resonance Absorption of Gravity Waves. Fluid Dyn 56, 678–684 (2021). https://doi.org/10.1134/S0015462821050062
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DOI: https://doi.org/10.1134/S0015462821050062