A special solution of wave dissipation by finite porous plates |
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Authors: | Wang Jin-jun |
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Institution: | Fluid Mechanics Institute, Peking University of Aeronautics and Astronautics, Beijing |
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Abstract: | The reflection and transmission of water waves caused by a small amplitude incident wave through finite fine porous plates with equal spacing and permeability in an infinitely long open channel of constant water depth and zero slope are studied. A special solution is obtained when the distance between the two neighbouring plates is an integral multiple of the half-wavelength of the incident wave. It is found that when the dimensionless porous-effect parameter G0 is equal to half the total plate number, the wave dissipation reaches a maximum, and only 50% of the incident wave energy remains in the reflected and transmitted waves. Meanwhile, the reflected and transmitted waves have the same amplitude. |
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Keywords: | wave motion small-amplitude wave linear wave incident wave wave dissipation porous plates |
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