The study of interaction between the internal wave and a permeable wall

• Main Authors: Chih-Hsiang Lin, 林志祥
• Other Authors: 孔慶華
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/89849468477889316473

碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 92 === Abstract Porous medium permeable wall is often used for coast construction work. This structure can reduce the reflection of wave and decrease the force acting on the structure itself, so as to increase the life of structure (such as breakwater, coast protector). When the wave is passing through porous medium permeable wall, the penetration and reflection phenomena will be occurred, which have close relationship with the porosity ratio and geometric shape of porous structure. The first half of this study discusses the homogeneous and isotropic porous wall. It is put within two layers of immiscible, incompressible, and non-viscous fluid. Both ends are infinite blow region. Top and bottom boundaries are fixed and impermeable surface. The porous Reynolds number of micro-disturbance method is used to solve boundary problem. The last half of this study discusses trapezoidal porous medium permeable wall. The pressure and wave height change of surface gravitational wave passing through declined permeable wall is observed. Due to Taiwan is surrounded by sea with limited land resources, it is the trend to expand the development to the ocean. The trapezoidal porous permeable wall can be used to simulate the breakwater at the coast which is able to be used to discuss the wave height change and energy dissipation of wave passing through this structure.