SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (10): 2121-2126.DOI: 10.1016/j.cjche.2018.06.007

• Chemical Engineering Thermodynamics • Previous Articles     Next Articles

Equilibrium morphology of gas-liquid Janus droplets: A numerical analysis of buoyancy effect

Shaobin Zhang1, Helen Yan2, Yuhao Geng1, Ke Wang3, Jianhong Xu1   

  1. 1 The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2 College of Chemistry, University of California, Berkeley, CA 94728, USA;
    3 State Key Laboratory of Industrial Vent Gas Reuse, The Southwest Research & Design Institute of the Chemical Industry, Chengdu 610225, China
  • Received:2018-03-31 Revised:2018-05-08 Online:2018-11-14 Published:2018-10-28
  • Contact: Jianhong Xu,E-mail address:xujianhong@tsinghua.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (21476121, 21322604), Beijing Natural Science Foundation (2162020) and a Foundation for Tsinghua Independent Research Projects (2014z21026).

Equilibrium morphology of gas-liquid Janus droplets: A numerical analysis of buoyancy effect

Shaobin Zhang1, Helen Yan2, Yuhao Geng1, Ke Wang3, Jianhong Xu1   

  1. 1 The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2 College of Chemistry, University of California, Berkeley, CA 94728, USA;
    3 State Key Laboratory of Industrial Vent Gas Reuse, The Southwest Research & Design Institute of the Chemical Industry, Chengdu 610225, China
  • 通讯作者: Jianhong Xu,E-mail address:xujianhong@tsinghua.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21476121, 21322604), Beijing Natural Science Foundation (2162020) and a Foundation for Tsinghua Independent Research Projects (2014z21026).

Abstract: In this article, a theoretical model for predicting the equilibrium morphology of gas-liquid Janus droplets was built. Based on this model, the effects of bubble radius and volume ratio on morphology change was systematically studied. The increase of bubble radius causes the two parts (bubble and oil drop) in Janus droplets tend to merge while the impact of volume ratio is complicated. When volume ratio increases, these two parts firstly tend to merge, then gradually separate. The accuracy of this model was verified by experimental results.

Key words: Microfluidics, Gas-liquid-liquid emulsion, Janus droplets

摘要: In this article, a theoretical model for predicting the equilibrium morphology of gas-liquid Janus droplets was built. Based on this model, the effects of bubble radius and volume ratio on morphology change was systematically studied. The increase of bubble radius causes the two parts (bubble and oil drop) in Janus droplets tend to merge while the impact of volume ratio is complicated. When volume ratio increases, these two parts firstly tend to merge, then gradually separate. The accuracy of this model was verified by experimental results.

关键词: Microfluidics, Gas-liquid-liquid emulsion, Janus droplets