| Summary: | 碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 101 === This study used Flow-3D by the mode of VOF numerical calculation to research on regular waves passing through different shapes of prism shoal with different profiles, as variations of terrain cause the phnomennons of shoaling, refraction, diffraction as well as energy concentration behind shoal. First, this study followed the literature simulated by the same configuration of edge conditions, which is calculated in order to adjust different shapes of prism shoal through computation. The result corresponds to the tendency. This study selected 4 different kinds of prism shoal to simulate and compare with long and short period wave and. As a result, prism shoal of V type has the better effect of energy concentration in comparison of prism shoal of U type. When waves go forward to the prism shoal , they cause refraction and diffraction by topographic effects and being centralized behind shoal. The size of concentration of energy changes due to the length of cycle, it shows that long cycle has an excellent effect of energy concentration. The breadth of concentration of energy refers to the opened-month of prism shoal of V type, it has the largest breadth at angel of 120 in the area of energy concentration and also has the better effect of energy concentration. Such differences ought to be prism shoal that causes effects of wave shoaling, refraction and diffraction, relating to the interaction and condition.
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