SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (4): 745-758.DOI: 10.1016/j.cjche.2018.08.023

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Analysis of deformation and internal flow patterns for rising single bubbles in different liquids

Xin Li1, Pan Zhang2, Jianlong Li1, Weiwen Wang1, Guanghui Chen1   

  1. 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
  • 收稿日期:2018-05-21 修回日期:2018-08-27 出版日期:2019-04-28 发布日期:2019-06-14
  • 通讯作者: Guanghui Chen
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21276132) and the Transformation Project of Scientific and Technological Achievements of Qingdao (16-6-2-50-nsh).

Analysis of deformation and internal flow patterns for rising single bubbles in different liquids

Xin Li1, Pan Zhang2, Jianlong Li1, Weiwen Wang1, Guanghui Chen1   

  1. 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
  • Received:2018-05-21 Revised:2018-08-27 Online:2019-04-28 Published:2019-06-14
  • Contact: Guanghui Chen
  • Supported by:
    Supported by the National Natural Science Foundation of China (21276132) and the Transformation Project of Scientific and Technological Achievements of Qingdao (16-6-2-50-nsh).

摘要: 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.

关键词: Multiphase flow, Bubble, Interface, Deformation analysis, Internal flow pattern, Rising behavior

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.

Key words: Multiphase flow, Bubble, Interface, Deformation analysis, Internal flow pattern, Rising behavior