水中微气泡上浮过程的力学影响因子研究  

Mechanics effect study of a rising micro-bubble in still water

作　　者：石晟玮[1] 王江安[2] 蒋兴舟[1] 

机构地区：[1]海军工程大学兵器工程系,武汉430033 [2]海军工程大学电子工程学院,武汉430033

出　　处：《海军工程大学学报》2008年第3期83-87,共5页Journal of Naval University of Engineering

摘　　要：从受力分析的角度，对气泡运动方程进行了推导，并对半径在40～500μm之间的微小气泡上浮过程进行了仿真计算。结果表明，当半径小于500μm、气泡上浮距离大于0．1m时，可忽略加速过程对气泡上浮速度的影响。在此基础上，对气泡运动方程进行了详细分析，结果表明，阻力系数与粘滞系数是影响气泡上浮速度的主要因素，它们的取值与上浮速度成反比，并得出了Re≤150条件下的微气泡运动通用的阻力系数表达式。The equation of bubble motion and its simulation results with the bubble radius of 40-500 μm were obtained by analyzing the forces acting on bubbles in still water. The result shows that when the bubble＇s radius is less than 500μm and the rise distance is larger than 0.1 m, the effects of added mass force and Basset force on the rise velocities can be neglected. By analysis of the equation of bubble motion, another important result was obtained that the drag coefficient and the dynamic viscosity of liquid are important in calculating the rise velocity of bubble and their values are in inverse proportion to the termind velocities. In addition, a general expression of drag coefficient were given when Re number is less than 150.

关 键 词：气泡 气泡运动 Basset力 

分 类 号：TB1[一般工业技术]