Results are presented from laboratory experiments on the effects of surfactant films on regular and wind-induced waves. For all the substances, there is a resonant-type frequency dependence for the ratio of the wave damping coefficients on water coated with surfactant to that on pure water. The surfactant films attenuate the wave spectra considerably and reduce the rates of increase in the spectral components by comparison with those on pure water under the same conditions.
Department of Marine and Inland Water Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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