第五章 結論與建議
5.2 建議
1. 本研究選用之次網格模式為等向性假設，大渦模擬係數Cs設為定值，未來 可對其作敏感度分析，或考慮選用其他之次網格模式(如 Mix scale model, MSM 或 dynamic sub-grid model, DSM)，並對這些模式進行適用性分析。
2. 本研究在網格加密的配置上係依人為給定，未來可將網格之配置方法依循 函數自動分布之機制，使網格切法更為精確。
3. 數值模式基本假設為垂向靜水壓分佈，建議可以考量垂直方向動量方程 式，建構為非靜水壓(non-hydrostatic)模式：
(1) 可進一步更合理的探討結構物局部流場、水位變化劇烈流場，例如橋墩、
丁壩周圍流場等。
(2) 對於寬深比較小的明渠水流案例，結合適用的紊流模式作進一步之探討。
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附錄 A 大渦紊流模擬控制方程式之推導
考慮三維不可壓縮流之那威爾-史托克司(Navier-Stokes)方程式：
連續方程式
i ( i j i j i j) 1 2 i
附錄 B 水深平均動量方程式之推導
12 2 11 1
1 2 2
將(B.2)、(B.3)等式右邊應用萊布尼茲法則對深度方向積分，加上動力邊界條
11 2 12 1 22 2 12 11 1 1