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The attenuation of monochromatic surface waves due to the presence of an inextensible cover
Affiliation:1. College of Marine Science and Technology, China University of Geosciences, Wuhan, China;2. Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China;3. Melbourne School of Engineering, University of Melbourne, Melbourne, Australia;4. Laboratoire d''Océanographie Physique et Spatiale, Centre de Brest, IFREMER, Plouzané, France;5. Department of Marine Technology, College of Information Science and Engineering, Ocean University of China, Qingdao, China;1. Work performed at the Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, USA;2. Carrier Corporation, Syracuse, NY 13221, USA;3. Department of Mathematics, The Pennsylvania State University, University Park, PA 16802, USA;4. Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, USA;5. Department of Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA
Abstract:The attenuation of surface gravity waves is an important process associated with air–sea and wave–current interactions. Here we investigate experimentally the attenuation of monochromatic surface gravity waves due to the presence of various surface covers. The surface covers are fixed in space such that they do not advect with the wave motion and are selected such that the bending modulus is negligible for the wave frequencies used in the experiment in order to minimize any flexural effects. Wave attenuation rates are found to be independent of wave steepness and the type of cover used over the tested parameter range. Results are consistent with the theoretical attenuation rate for an inextensible surface cover.
Keywords:Surface gravity waves  Wave attenuation  Surface covers  Viscosity
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