| REFLECTION AND TRANSMISSION OF WATER WAVES BY POROUS VERTICAL PLATES |
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| 引用本文： | Wang Jin-jun Institute of Fluid Mechanics,Beijing University of Aeronautics and Astronautics,Beijing 100083.P.R.China. REFLECTION AND TRANSMISSION OF WATER WAVES BY POROUS VERTICAL PLATES[J]. 水动力学研究与进展(B辑), 1992, 0(4) |
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| 作者姓名： | Wang Jin-jun Institute of Fluid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083.P.R.China |
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| 作者单位： | Wang Jin-jun Institute of Fluid Mechanics，Beijing University of Aeronautics and Astronautics，Beijing 100083.P.R.China |
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| 摘 要： | The reflection and transmission of small amplitude surface waves by two verticalporous plates with spacing L fixed in the middle of an infinitely long channel of constant depthare studied.Analytical solutions in closed forms are obtained for the surface wave profiles.It isfound that,when the spacing L is a quarter-wavelength plus a multiple of the half-wavelength ofthe incident wave,not only the reflected wave amplitude but also the transmitted wave amplitudereduce to minima.On the other hand,when the spacing L is a multiple of the half-wavelengthof the incident wave,both the reflected wave amplitude and the transmitted wave amplitude havethe maximum values.For these two special cases,the energy dissipation caused by the twoporous plates and the water between them are also discussed.
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REFLECTION AND TRANSMISSION OF WATER WAVES BY POROUS VERTICAL PLATES |
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| Wang Jin-jun Institute of Fluid Mechanics,Beijing University of Aeronautics and Astronautics,Beijing .P.R.China. REFLECTION AND TRANSMISSION OF WATER WAVES BY POROUS VERTICAL PLATES[J]. Journal of Hydrodynamics, 1992, 0(4) |
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| Authors: | Wang Jin-jun Institute of Fluid Mechanics Beijing University of Aeronautics Astronautics Beijing .P.R.China |
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| Affiliation: | Wang Jin-jun Institute of Fluid Mechanics,Beijing University of Aeronautics and Astronautics,Beijing 100083.P.R.China |
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| Abstract: | The reflection and transmission of small amplitude surface waves by two vertical porous plates with spacing L fixed in the middle of an infinitely long channel of constant depth are studied.Analytical solutions in closed forms are obtained for the surface wave profiles.It is found that,when the spacing L is a quarter-wavelength plus a multiple of the half-wavelength of the incident wave,not only the reflected wave amplitude but also the transmitted wave amplitude reduce to minima.On the other hand,when the spacing L is a multiple of the half-wavelength of the incident wave,both the reflected wave amplitude and the transmitted wave amplitude have the maximum values.For these two special cases,the energy dissipation caused by the two porous plates and the water between them are also discussed. |
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| Keywords: | wave motion reflection transmission porous plate surface wave small amplitude |
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