Thin Films Flowing on Vertical Fibers
Thin Films Flowing on Vertical Fibers
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DOI：
10.1209/0295-5075/13/8/009
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发表时间：
1990-12
期刊：
影响因子：
1.8
通讯作者：
D. Quéré
中科院分区：
文献类型：
--
作者：
D. Quéré
我们描述环形薄膜流动和变薄沿着垂直纤维。根据膜的厚度和纤维的半径，可以观察到两种不同的行为：i）当膜厚时，由于瑞利不稳定性和向下流动而产生液滴。其中一些通过吞噬其他的来生长，然后迅速落下，留下一层厚厚的薄膜，然后又变成水滴。ii）对于大纤维上的薄膜，不稳定性不会因为流动而增长。我们提出了一个定量研究的条件下，滴不出现，并表明，这些条件是兼容的瑞利不稳定性的非线性饱和的情况下。
We describe annular films flowing and thinning along vertical fibers. According to the film thickness and to the radius of the fiber, two different kinds of behaviour can be observed: i) when the film is thick, drops develop because of the Rayleigh instability and flow downward. Some of them grow by swallowing the other ones, and quickly fall, leaving behind them a thick film which breaks in turn into droplets. ii) For a thin film on a large fiber, the instability cannot grow because of the flow. We present a quantitative study of the conditions under which drops do not appear, and show that these conditions are compatible with a scenario of nonlinear saturation of the Rayleigh instability.