| 黏性液体中单个上升气泡的流体动力学行为(英文) |
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| 引用本文： | 蔡子琦,包雨云,高正明. 黏性液体中单个上升气泡的流体动力学行为(英文)[J]. 中国化学工程学报, 2010, 18(6): 923-930. DOI: 10.1016/S1004-9541(09)60149-X |
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| 作者姓名： | 蔡子琦 包雨云 高正明 |
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| 作者单位： | State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (20821004,20990224);the National Basic Research Program of China (2007CB714300) |
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| 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 func-tions are obtained relating the drag coefficient,CD,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 Etvs number and Mo,applicable to a wide range of system properties,espe-cially in high viscosity liquids,is also suggested.
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| 关 键 词： | bubble rising velocity viscous liquid drag coefficient deformation |
| 收稿时间： | 2010-04-27 |
Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids |
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| Ziqi CAI, Yuyun BAO,Zhengming GAO,. Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids[J]. Chinese Journal of Chemical Engineering, 2010, 18(6): 923-930. DOI: 10.1016/S1004-9541(09)60149-X |
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| Authors: | Ziqi CAI Yuyun BAO Zhengming GAO |
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| Affiliation: | State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| 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, CD, 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 Eötvös number and Mo, applicable to a wide range of system properties, especially in high viscosity liquids, is also suggested. |
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| Keywords: | bubble rising velocity viscous liquid drag coefficient deformation |
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