物理学报Issue(21)：269-281,13.DOI:10.7498/aps.62.214704
倾斜粗糙壁面上含不溶性活性剂溶液的动力学特性
Dynamics of insoluble surfactant-laden thin films flow over inclined random topography
摘要
Abstract
For the flow of an insoluble surfactant-laden thin film and droplet on inclined random topography, the lubrication theory is used to derive the evolution equations of thin liquid film thickness and interfacial surfactant concentration. Characteristics of thin film flow and droplet spreading, as well as the influence of topography structure are numerically simulated with PDECOL code. Results show that under the action of gravitational component and Marangoni effects, the thin film flow and droplet spreading is accelerated;the capillary ridge emerges at the thin film edge and the droplet center;and at the bottom of the thin film and droplet, the depression is generated. While the deformation of liquid film free surface is more significant due to the effect of random topography. The increasingθhas a role of enhancing gravitational component and Marangoni effects, leading to the enhancement of the capillary ridge and depression. The increase of D promotes the thin film flow and droplet spreading, but causes the deformation amplified;and the increased k0 can induce the evolutions of thin film flow and droplet spreading to slow down and inhibit the formation of capillary ridge and depression. In addition, compared with the thin film flow, the impact of D and k0 on the speed of droplet spreading is relatively weak.关键词
随机粗糙壁面/液膜/Marangoni效应/倾斜流动Key words
random topography/thin films/Marangoni effects/inclined flow引用本文复制引用
李春曦,裴建军,叶学民..倾斜粗糙壁面上含不溶性活性剂溶液的动力学特性[J].物理学报,2013,(21):269-281,13.基金项目
国家自然科学基金(批准号:10972077,11202079)和中央高校基本科研业务费(批准号:13MS97)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.10972077,11202079), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No.13MS97) （批准号:10972077,11202079）
