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含活性剂超薄液膜演化过程的稳定性研究

叶学民 姜凯 沈雷 李春曦

叶学民, 姜凯, 沈雷, 李春曦. 含活性剂超薄液膜演化过程的稳定性研究[J]. 力学学报, 2013, 45(5): 681-689. doi: 10.6052/0459-1879-12-381
引用本文: 叶学民, 姜凯, 沈雷, 李春曦. 含活性剂超薄液膜演化过程的稳定性研究[J]. 力学学报, 2013, 45(5): 681-689. doi: 10.6052/0459-1879-12-381
Ye Xuemin, Jiang Kai, Shen Lei, Li Chunxi. STABILITY OF ULTRATHIN LIQUID FILM EVOLUTION WITH SURFACTANT[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(5): 681-689. doi: 10.6052/0459-1879-12-381
Citation: Ye Xuemin, Jiang Kai, Shen Lei, Li Chunxi. STABILITY OF ULTRATHIN LIQUID FILM EVOLUTION WITH SURFACTANT[J]. Chinese Journal of Theoretical and Applied Mechanics, 2013, 45(5): 681-689. doi: 10.6052/0459-1879-12-381

含活性剂超薄液膜演化过程的稳定性研究

doi: 10.6052/0459-1879-12-381
基金项目: 国家自然科学基金(10972077, 11202079)和中央高校基本科研业务费专项基金(13MS97)资助项目.
详细信息
    通讯作者:

    叶学民,博士,教授,主要研究方向:从事流体力学理论及应用、活性剂铺展研究工作。E-mail:yexuemin@163.com

  • 中图分类号: TK124;O357.1

STABILITY OF ULTRATHIN LIQUID FILM EVOLUTION WITH SURFACTANT

Funds: The project was supported by the National Natural Science Foundation of China (10972077, 11202079) and Chinese Universities Scientific Fund (13MS97).
  • 摘要: 针对固体基底上厚度小于100 nm的含活性剂超薄液膜演化过程, 基于润滑理论推导出包含分离压影响的液膜厚度和活性剂浓度的演化方程, 采用正则模态法导出了描述液膜线性稳定性的特征方程, 分析了多个特征参数对线性稳定性的影响, 数值模拟了液膜厚度和活性剂浓度演化历程, 对比了模拟所得非线性结果与线性分析预测结果的一致性.结果表明:范德华力具有促进扰动增长的作用, 较强的玻恩斥力促使扰动衰减, 使液膜趋于稳定;较小的毛细力数易使液膜凹陷处发生二次失稳, 并最终导致去润湿现象发生;液膜厚度和溶于液膜内部的活性剂浓度初值越大, 液膜稳定性越强, 液膜表面活性剂浓度影响则相反;增大吸附系数不利于液膜稳定性.

     

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出版历程
  • 收稿日期:  2012-12-31
  • 修回日期:  2013-05-07
  • 刊出日期:  2013-09-18

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