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

被引：0
|
作者：
C. Duprat
C. Ruyer-Quil
F. Giorgiutti-Dauphiné
机构：
[1] Lab. FAST,
[2] UMR 7608,undefined
[3] Campus Universitaire,undefined
来源：
The European Physical Journal Special Topics | 2009年 / 166卷
关键词：
European Physical Journal Special Topic; Linear Stability Analysis; Force Frequency; Periodic Perturbation; Secondary Instability;
D O I：
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中图分类号：
学科分类号：
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.
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页码：63 / 66
页数：3
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