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題名 | 利用三維大渦流模式探討孤立波與透水潛堤互制=Simulation of Solitary Wave Interaction with a Submerged Permeable Breakwater Using Three-Dimensional LES Model |
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作者姓名(中文) | 葉佳霖; 胡凱程; 吳昀達; 蕭士俊; | 書刊名 | 海洋工程學刊 |
卷期 | 13:2 2013.06[民102.06] |
頁次 | 頁119-137 |
分類號 | 443.31 |
關鍵詞 | 孤立波; 透水潛堤; 三維數值模擬; 大渦流模式; Solitary wave; Permeable breakwater; Three-dimensional numerical solver; Large-eddy-simulation; |
語文 | 中文(Chinese) |
中文摘要 | 本文研究目的為利用三維數值模式模擬孤立波與透水潛堤之交互作用,其中透水潛堤以兩種不同概念進行模擬,一是空間平均(spatial average)孔隙結構物;另一個則為由圓球所構成之三維真實透水結構物。數值模式(Hu et al., 2012)用以求解巨觀型態(macroscopic)的黏性流體運動方程式(Navier-Stokes equation)。其中以van Gent(1995)所提出的公式來模擬流體流經平均孔隙結構所遭受到的阻力,而在流體經過兩種型態透水結構物所呈現紊流現象則以大渦流模擬(large-eddy-simulation)來描述。為了說明本文數值模試可信度,先以Wu et al.(2012)的實驗數據做為模試驗證參考依據。後比較三種不同阻力係數配置所描述的平均孔隙結構與三維真實圓球透水結構物之數值結果,最後針對以空間平均結構模擬透水潛堤與三維真實圓球透水結構物之結果加以討論。 |
英文摘要 | This study investigates a solitary wave interaction with a submerged permeable structure by using a three-dimensional numerical model. The submerged permeable structure is conducted by two types of porous object, one is the two-dimensional spatial-averaged drag force (van Gent, 1995) and the other is a three-dimensional real permeable obstacle consisted by uniform glass spheres. The three-dimensional numerical model is used to solve the macroscopic Navier-Stokes equation coupled with large-eddy-simulation with a spatial-averaged drag force (van Gent, 1995) for the porous media flow (Hu et al., 2012). The numerical validation is made against the experimental data (Wu et al., 2012). The free surface elevation and velocity solved by present numerical model with three sets of drag force parameters and a real permeable obstacle made by uniform glass spheres are tested against the experimental data (Wu et al., 2012). Discussions for the discrepancies between the numerical simulations with the spatial-averaged drag force and a real permeable obstacle made by uniform glass spheres are given. |
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