A STABLE TRANSITIONAL FLOW PATTERN IN THE SURFACE-TENSION DRIVEN SPREADING OF ETHANOL WATER SOLUTIONS

被引：10
|
作者：
WALTERS, DA
机构：
[1] 2353 Cambridge Blvd., California Institute of Technology, Columbus, Ohio 43221, Pasadena
来源：
LANGMUIR | 1990年 / 6卷 / 05期
关键词：
D O I：
10.1021/la00095a018
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
When a drop of one ethanol-water solution is placed on the surface of a different ethanol-water solution, the difference in surface tension along the drop boundary causes spreading behavior which depends sensitively on the ethanol concentrations of the two bulk phases. Within a narrow range of concentration combinations, an intricate flow pattern with azimuthal symmetry was observed through the use of schlieren photography. This phenomenon, believed to be a novel Marangoni effect, was characterized in terms of its qualitative features and the region of concentrations for which it occurred. The concentration zone was consistent with a fixed surface tension difference between the two solutions. © 1990, American Chemical Society. All rights reserved.
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页码：991 / 994
页数：4
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