微氣泡的上浮研究一直是困擾學者的問題，現今的實驗設備無法觀察小於 的氣泡，因此透過數值模擬的方式計算微氣泡的行為是本文的目的。本文提出雙重網格方法(two-region method)應用於求解氣泡的三維暫態流場，透過雙重網格系統，可在氣泡周圍想要觀察的地方使用較密的網格來觀察計算，如此不但能夠減少程式記憶體的浪費，同時也能有較準確的成果。
計算移動氣泡的暫態流場，最佳的辦法就是應用非慣性座標系統(noninertial frame of reference)，使座標軸跟隨著氣泡移動，如此作法可以將氣泡固定在計算流域的中心，不至於因為氣泡位置網格移動造成資料傳遞不連續，而形成誤差，並且使用雙重網格方法求解流場的部份，求出流場之後，即可觀察各個不同直徑的氣泡的暫態行為，同時與實驗數據比較模擬結果的正確性，本文的方法精確性頗佳，希望將此方法獻給各位研究者參考。

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