Wave attenuation by a submerged flexible permeable membrane

Wave attenuation by a porous flexible membrane, which is submerged horizontally, is analyzed in the case of finite water depth under the hypothesis of linear water wave theory. By using the matched eigenfunction expansion method, the physical problem is handled. To understand the efficiency of the present model as a breakwater, reflection and transmission coefficients and membrane deflection are calculated and evaluated for different physical quantities. It is observed that the submerged membrane, dissipates a considerable amount of wave energy, which leads to less wave reflection and transmission. This model can be useful in the development of a mechanism to reduce the wave load for different marine constructions on coastal facilities.