Experimental study of the instability of a film flowing down a vertical fiber

被引：11
|
作者：
Duprat, C. [1 ,2 ]
Ruyer-Quil, C. [1 ,2 ]
Giorgiutti-Dauphine, F. [1 ,2 ]
机构：
[1] Campus Univ, Lab FAST, UMR 7608, F-91405 Orsay, France
[2] Lab FAST, UMR 7608, F-91405 Orsay, France
来源：
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2009年 / 166卷
关键词：
VISCOUS BEADS;
D O I：
10.1140/epjst/e2009-00879-9
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The wavy dynamics of a viscous film flowing axisymmetrically on a vertical fiber is characterized experimentally. The study of the initial response of the flow to natural noise shows a well-defined transition between a convective and an absolute instability [1]. In the convective case, disturbances of controlled frequencies have been applied at inlet. The flow responds to inlet excitation at frequencies lower than a well-defined cut-off frequency. A good agreement has been found with the linear stability analysis and with the solution to a two-equation model [2] in the nonlinear regime.
引用
收藏
页码：63 / 66
页数：4
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