中文摘要：

运用VOF数值模拟技术分析了水中气泡的运动特性。采用了数值模拟方法测量气泡上升过程中的形状、上升速度和气泡轨迹,采用自编程序的数字图像处理技术进行模拟结果的后处理,并对获得的结果进行讨论分析。从分析结果可以看出：直径2 mm以下的小气泡呈直线或＂Z＂字形运动状态,直径大于2 mm的气泡为螺旋运动或者更复杂的随机运动;气泡速度经过初始加速阶段以后存在明显的震荡,这个震荡幅度与气泡的长宽比有很好的相关性;气泡在上升过程中顶部和尾部速度比中部速度大,气泡尾部涡竖直方向上分布的不对称状态是气泡上升路径发生改变的主要原因。

英文摘要：

The VOF numerical simulation was used to research on the motion behaviors of bubble rising in water.Bubble shape,rise velocity and bubble motion trajectory were treated by digital image processing technology.It can be seen from the results：the motion trajectory of small bubble（d2 mm） shows straight line or Z-shaped way,the motion trajectory of the larger bubble（d2 mm） shows spiral motion or more complex.After the bubble initial acceleration time,the bubble swings are obvious.The amplitude of the bubble vibration is good correlated with the ratio of bubble width to length.The top and bottom velocity of the bubble rising faster than the central velocity and the asymmetric distribution of the tail vortex in the vertical direction is the main reason for change of bubble rise trajectory.