Spreading of a thin wetting film: Microscopic approach

被引:39
作者
Burlatsky, SF
Oshanin, G
Cazabat, AM
Moreau, M
Reinhardt, WP
机构
[1] COLL FRANCE,PHYS MAT CONDENSEE LAB,URA CNRS 792,F-75231 PARIS 05,FRANCE
[2] UNIV WASHINGTON,DEPT CHEM BG10,SEATTLE,WA 98195
来源
PHYSICAL REVIEW E | 1996年 / 54卷 / 04期
关键词
D O I
10.1103/PhysRevE.54.3832
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
In this paper we present a microscopic model description of spreading kinetics of a monomolecularly thin wetting film climbing from a bath of liquid along a vertical solid wall. We find analytically that both the linear extension and the mass (number of particles) of the film grow in proportion to root t, in accord with experimental observations. We also analyze the details of the fine structure of the wetting film and determine explicitly the concentration profile along the film and concentration gradients at the tip of the film and in the vicinity of the liquid bath. We show that the essential physical mechanism responsible for film's growth is associated with the diffusive transport of vacancies from the tip of the film to the liquid bath, where they are filled with fluid particles.
引用
收藏
页码:3832 / 3845
页数:14
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