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研究生: 謝哲瑋
論文名稱: 氣泡於鄰近垂直壁面區域浮升之黏性流場研究
Flow structure around a rising bubble near a vertical wall in a viscous liquid
指導教授: 李雄略
口試委員:
學位類別: 碩士
Master
系所名稱: 工學院 - 動力機械工程學系
Department of Power Mechanical Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 58
中文關鍵詞: 氣泡壁面
相關次數: 點閱:3下載:0
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  • 觀於微氣泡於鄰近璧面區域上浮的研究,已有許多關於此方面的實驗結果,但此種研究的模擬卻是少之又少,因此本文的目的是透過數值分析的方式來模擬出微氣泡在鄰近璧面區域的行為並與實驗互相比較驗證。
    本文使用雙重網格系統,來模擬三維暫態微氣泡於鄰近璧面區域的流場情形,其中雙重網格的內網格系統是使用非慣性座標系統,跟隨者氣泡移動,可以固定氣泡的計算區域,避免氣泡在網格內移動而造成計算上的誤差,而外網格系統是使用慣性座標系統,相對於內網格系統,便可以記錄氣泡在每個時間區間的移動情形,進而觀察出是否有受wall effect的影響。


    摘要 I 目錄 II 圖目錄 IV 符號說明 VI 第一章 緒論 1 第二章 理論分析 5 2.1問題描述 5 2.2建立統御方程式及其無因次化 5 2.3非慣性座標系統(noninertial frame of reference)下的動量方程式 10 2.4邊界條件 12 2.4.1內網格系統 12 2.4.2外網格系統 12 第三章 數值方法 14 3.1動量方程式之差分 14 3.2壓力連結方程式 18 3-3 內外網格資料傳遞 22 3-4 定義氣泡漂移偏角 23 3-5 計算氣泡漂移偏角 24 3-6 計算流程 25 第四章 結果與討論 28 4.1模擬參數 28 4.2收斂準則 28 4.3 速度場與壓力場 29 4.4 WALL EFFECT所造成的影響 30 第五章 結論 32 參考文獻 33

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