物理化学学报 >> 1996, Vol. 12 >> Issue (08): 709-715.doi: 10.3866/PKU.WHXB19960808

研究简报 上一篇    下一篇

界面流变性质对小液滴聚并过程的影响

李佟茗,赵丽燕   

  1. 天津大学化学工程系,天津 300072
  • 收稿日期:1996-02-05 修回日期:1996-04-08 发布日期:1996-08-15
  • 通讯作者: 李佟茗

Effect of Interfacial Rheological Properties on Coalescence between Small Drops

Li Tong-Ming,Zhao Li-Yan   

  1. Department of Chemical Engineering,Tianjin University,Tianjin 300072
  • Received:1996-02-05 Revised:1996-04-08 Published:1996-08-15
  • Contact: Li Tong-Ming

摘要:

对表面活性剂溶液中两个小液滴的聚并现象进行理论分析,并考虑相界面上质量传递对该过程的影响,得到聚并时间与界而张力和界面张力梯度、界面粘度、表面活性剂界面扩散系数、连续相和分散相的主体性质、范德华力及液滴半径的关系.

关键词: 液滴, 聚并时间, 液膜流动

Abstract:

 The coalescence process between two small liquid drops in surfactant solutions has been studied. A model is developed for the dynamics of the thinning dimpled film in which the influence of London-van der Waals forces is considered. The effects of surface diffusion, interfacial viscosities, and interfacial tension gradient on coalescence are investigated. The coalescence time, which is the time required for the thinning and rupture of the liquid film, is expressed as a function of the drop sizes, the physical properties of two liquid phases, and inter facial properties. The predictions are in good agreement with the previous experimental data.

Key words: Liquid drop, Coalescence time, Liquid film flow