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頁籤選單縮合
題名 | MAC方法配合高度函數應用於洩水流=Applications of the MAC Method with Height Function in Sluice Gate Flow |
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作者姓名(中文) | 施清吉; 林富松; | 書刊名 | 農業工程學報 |
卷期 | 43:4 1997.12[民86.12] |
頁次 | 頁19-27 |
分類號 | 434.287 |
關鍵詞 | 洩水流; MAC方法; 自由面; Sluice gate flow; MAC method; Free surface; |
語文 | 中文(Chinese) |
中文摘要 | 根據Navier-Stokes 運動方程式及連續方程式,採用MAC方法並配合一高度函數 模擬二維黏滯性不可壓縮之洩水流。模擬結果與前人研究結果之比較,計有自由面、流量係 數、收縮係數與壓力分佈。 模擬洩水流的上游福祿數大約介於 0.1 到 0.3,視洩水閘門間 隙及總水頭間的比值而區分,其值計有 0.3、0.4 與 0.53 等三種。在模擬過程中,入流總 水頭為定值,但入流深度與速度均為浮動。趨近於定量流之利斷以兩相鄰時段的相對差距為 標,其值約為○ (10 ) |
英文摘要 | Based upon the Navier-Stokes equations of motion and the continuity equation, a two dimen-sional flow of an incompressible fluid under a sluice gate is numerically studied using the MAC method with a height function to represent the water surface. The numerical results consist of the free surface, the discharge coefficient, the contraction coefficient, the pressure distribution on the sluice gate and the location of vena contracta. The upstream Froude number ranges between 0.1 to 0.3, and rations of the gate opening to the to total head are 0.3,0.4 and 0.53. In the course of sinulation, the total head remained in unchanged, while the inflow depth and the inflow velocily are changed with cycle. The criterion for simulation flow to approach steady was based on the relative deviation of two consecutive depths, whcih is of order ○ (10 ) |
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