中国电机工程学报2011，Vol.31Issue(14)：63-70,8.
含表面活性剂液滴的受热铺展特性
Spreading of A Liquid Drop Containing Insoluble Surfactant Driven by Thermocapillary
摘要
Abstract
The spreading of a liquid drop on thin liquid film in the presence of insoluble surfactant and isothermal or non-uniform heating from below was considered. Coupled nonlinear evolution equations for the film thickness and surfactant concentration were derived on the base of lubrication theory. The spreading processes on different conditions were calculated using PDECOL program and the numerical results were presented, while the effects of parameters on the spreading process were discussed. The results show that complex droplet patterns are obtained for an isothermal underlying substrate. For the case of non-uniform heating condition, more stable double ridges patterns are observed. For all situations, decreasing Marangoni parameter and surface Biot number, increasing surface Peclet number will stabilize the film. On the condition of non-uniform heating, appropriate heating number can also lead to a stable spreading process. Compared to the initial uniform film flow, which is covered by surfactants and on the same heating condition, the Marangoni effect introduced by thermal gradient is more significant on the drop spreading.关键词
铺展/非溶性活性剂/液滴/液体薄膜/Marangoni效应分类
能源科技引用本文复制引用
王松岭,李春曦,叶学民..含表面活性剂液滴的受热铺展特性[J].中国电机工程学报,2011,31(14):63-70,8.基金项目
国家自然科学基金项目(10972077) （10972077）
中央高校基本科研业务费专项基金项目(09MG33,10MG16). （09MG33,10MG16）
