| 研究生: |
廖志勳 LIAO, CHIH-SHUN |
|---|---|
| 論文名稱: |
明渠緩變速流數值模擬 Numerical Simulation Gradually-varied Flow in Open Channels |
| 指導教授: |
呂珍謀
Leu, Jan-Mou |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 水利及海洋工程學系 Department of Hydraulic & Ocean Engineering |
| 論文出版年: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 中文 |
| 論文頁數: | 63 |
| 中文關鍵詞: | M2曲線 、流速分佈 、定量緩變速流 、自由液面 |
| 外文關鍵詞: | Velocity Distribution, Free Surface, Curve, Steady Gradually Varied Flow |
| 相關次數: | 點閱:146 下載:3 |
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本研究使用FLUENT計算流體力學軟體模擬明渠定量緩變速流之之流況,藉由軟體模擬明渠緩坡渠道至陡坡流場特性,瞭解M2曲線水面線及流速分佈。在研究中,採用有限體積法(finite volume method)離散控制方程式,以一階上風法離散對流項,重力權重法(body force weighted)離散壓力項,由SIMPLE法耦合速度和壓力,使整個流場符合質量守恆及動量守恆,再由多相流k-ε紊流模式模擬渠流紊流情形,最後再應用質量流通率構置自由液面水面線。本研究透過與明渠緩變速流理論值比對,模擬自由液面及渠道中心流速剖面發現,FLUENT可以成功的模擬出明渠緩變速流之M2曲線流況。
In this study, the commercial hydrodynamic software, FLUENT is adopted to construct a model for simulating the steady gradually varied flow in M2 curves. The modules used are the finite volume discretization, the first order upwind scheme, the near wall k-ε model and volume of fluid approach. Using GAMBIT preprocessor, a model that has grid system composed of hexahedron meshes with total cells number of approximate 2 million 27 thousand is generated. The constructed model is verified using mean velocity and free surface profiles from steady gradually varied flow theory, and prove that this model is capable of simulating the steady gradually varied flow in M2 curves.
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