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題 名 | 二相流模式研究自由液面流在不規則底床運行之現象=Simulation of Free Surface Flows on An Uneven Bottom by a Two-phase Flow Model |
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作 者 | 鄧志浩; 鄭雅允; | 書刊名 | 中原學報 |
卷 期 | 32:1 2004.03[民93.03] |
頁 次 | 頁21-30 |
分類號 | 440.137 |
關鍵詞 | 明渠流; 二相流; 最小平方有限元素法; Open channel flow; Two phase flow; Least-squares finite element method; |
語 文 | 中文(Chinese) |
中文摘要 | 本文利用三相流(two-phaseflows)模式探討明渠水流在不規則底床運行之現象,模式之建立是採用最小平方有限元素法(Least-SquaresFinite Element Method)求解Navier-Stokers方程式。自由液面與空氣接觸之處理是考慮流體體積法(VOF)並配以一連續函數(在此稱為colorfunction)來計算液面變化,本文利用固定網格求解不同結構渠道模擬明渠流之自由液面現象,對於不規則底床模擬之結果與前人實驗之研究極為吻合。最後,本研究探討自由湧流撞擊固體結構物以不同高度、不同距離,探討自由表面流場與壓力的分佈及變化。 |
英文摘要 | The free surface flow propagates in an uneven bed has been simulated by a two-phase flow model. The leastsquares finite element method is adopted to solve the Navier-Stokes equation for establishing the model. A VOF scheme associated with a continuous function, color function, is considered for the treatment of the interface between liquid and gas. A fixed mesh domain is designed for the simulation of various flow problems. The simulation results are in good agreement with the experimental measurements. For the free surge propagates on a solid block with different sizes and heights, the free surface variation and pressure distribution are carefully investigated in this study. |
本系統中英文摘要資訊取自各篇刊載內容。