An Experimental Study of Wave Characteristics Propagating with an Uniform Flow over a Permeable Submerged Breakwater

• Main Authors: Tseng,Yu-Tsan, 曾友燦
• Other Authors: Huang,Chai-Cheng
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/01141998242227546153

碩士 === 國立中山大學 === 海洋環境學系 === 86 === The aim of this study is to simulate the deformation of the waves with an uniform current passing through porous submerged breakwaters. The parameters such as reflection coefficient, transmission coefficient, and the dynamic water pressure at the center of submerged breakwaters, and the wave profiles at the reflected and transmitted interfaces are obtained by physical modeling in the hydrodynamic laboratory. Then, the experimental results was used to verify the numerical model which is based on the boundary element method (BEM). The small amplitude wave theory superposed an uniform current and combined with the governing equation of porous media fluid field developed by Sollitt&Cross were used to investigate the interaction between the passing waves and porous submerged breakwaters. The numerical solutions and the experimental results have good agreements. It shows that the longer the wave period, the greater the reflection coefficient; and the smaller the transmission coefficient. It shows that the dynamic water pressure at the center of the porous submerged breakwater will increase with the longer period of waves. These results may offer a design reference for practical engineers.