Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

›› 2010, Vol. 18 ›› Issue (6): 923-930.

Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

蔡子琦, 包雨云, 高正明

State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2010-04-27 修回日期:2010-08-25 出版日期:2010-12-28 发布日期:2010-12-28
通讯作者: GAO Zhengming, E-mail: gaozm@mail.buct.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20821004,20990224);the National Basic Research Program of China (2007CB714300)

Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

CAI Ziqi, BAO Yuyun, GAO Zhengming

State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2010-04-27 Revised:2010-08-25 Online:2010-12-28 Published:2010-12-28
Supported by:
Supported by the National Natural Science Foundation of China (20821004,20990224);the National Basic Research Program of China (2007CB714300)

摘要/Abstract

摘要： The rising behavior of single bubbles has been investigated in six systems with different viscosity and Morton number(Mo) from 3.21×10^-11 to 163. Bubbles with maximum equivalent diameter of up to 16 mm were investigated. The bubble Reynolds number(Re) ranged from 0.02 to 1200 covering 3 regimes in which two functions are obtained relating the drag coefficient,C_D,with Re and Mo. It has been found that in the high Reynolds number regime the drag coefficient increases until the Reynolds number of about 1200. The classic expression of Jamialahmadi(1994) is improved and extended to high viscosity liquids. A new relationship for the aspect ratio of deformed bubbles in terms of Re,the E鰐v鰏 number and Mo,applicable to a wide range of system properties,especially in high viscosity liquids,is also suggested.

关键词: bubble, rising velocity, viscous liquid, drag coefficient, deformation

Abstract: The rising behavior of single bubbles has been investigated in six systems with different viscosity and Morton number(Mo) from 3.21×10^-11 to 163. Bubbles with maximum equivalent diameter of up to 16 mm were investigated. The bubble Reynolds number(Re) ranged from 0.02 to 1200 covering 3 regimes in which two functions are obtained relating the drag coefficient,C_D,with Re and Mo. It has been found that in the high Reynolds number regime the drag coefficient increases until the Reynolds number of about 1200. The classic expression of Jamialahmadi(1994) is improved and extended to high viscosity liquids. A new relationship for the aspect ratio of deformed bubbles in terms of Re,the E鰐v鰏 number and Mo,applicable to a wide range of system properties,especially in high viscosity liquids,is also suggested.

Key words: bubble, rising velocity, viscous liquid, drag coefficient, deformation

蔡子琦, 包雨云, 高正明. Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids[J]. , 2010, 18(6): 923-930.

CAI Ziqi, BAO Yuyun, GAO Zhengming. Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids[J]. , 2010, 18(6): 923-930.

参考文献

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Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

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