Analysis of deformation and internal flow patterns for rising single bubbles in different liquids |
| |
Authors: | Xin Li Pan Zhang Jianlong Li Weiwen Wang Guanghui Chen |
| |
Affiliation: | 1.College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;2.College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China |
| |
Abstract: | Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions, and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters, i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol, 86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes. |
| |
Keywords: | Corresponding author Multiphase flow Bubble Interface Deformation analysis Internal flow pattern Rising behavior |
本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录! |
| 点击此处可从《中国化学工程学报》浏览原始摘要信息 |
|
点击此处可从《中国化学工程学报》下载全文 |
|