本論文係利用二維數值造波水槽模擬規則波通過一潛沒式垂直薄板之交互作用。而本研究所使用的數值模式為COBRAS (COrnell BReaking wave And Structure)，為模擬真實流體的情況，本文使用之數值模式為求解雷諾方程式 (RANS) 與非線性 紊流閉合模式，並採用流體體積法 (VOF) 追蹤自由液面的變化情形。
而為更進一步瞭解真實質點之移動情形，本文結合離散質點模式 (Discrete particle model) 來計算質點的運動軌跡。此方法亦分別和Umeyama (2013) 之孤立波質點軌跡與Umeyama (2012) 之規則波質點軌跡進行驗證，其比較結果皆相當良好，顯示離散質點模式有其可信度。
本文藉由改變波浪之週期與結構物之孔隙率，進而得到一系列關於規則波與潛沒式垂直薄板之交互作用關係，而討論的主題包括渦度場、結構物之反射、透射及消散係數，以及結構物附近之質點運動軌跡。

This study presents a numerical study of regular waves interaction with a vertical, thin, submerged and slotted barrier using a two-dimensional volume of fluid (VOF)-type numerical model. The numerical model solves the Reynolds Averaged Navier-Stokes (RANS) equations for describing mean flow field with the nonlinear turbulence closure model for the effect of turbulence. The VOF method is used for tracking the free surface motion. The motion of fluid particle can provide an insight to the possible sediment movement. However some physical characteristics are distinct between the real sediment and the pure fluid particle. In order to provide more information on the possible sediment movement, the discrete particle model is integrated with the present RANS code using one-way coupling approach to calculate the trajectories of sediment. The capability of discrete particle model is validated against the experiments of Umeyama (2013) and Umeyama (2012) respectively for solitary wave and regular wave cases. Comparisons between present numerical results and the experimental data show fairly good agreements. Then, a set of numerical tests is carried out for a regular wave train propagating over a vertical, thin and submerged barrier with various wave periods and six types of barrier’s porosity. In particular, the characteristics of vorticity field in the vicinity of barrier, the variations of reflection, transmission and dissipation coefficients, and the trajectories of particles near the barrier are discussed and summarized.

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