Quick deposition of a fluid on the wall of a tube
Quick deposition of a fluid on the wall of a tube
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DOI：
10.1063/1.1289396
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发表时间：
2000-10-01
影响因子：
4.6
通讯作者：
Quéré, D
中科院分区：
文献类型：
--
作者：
Aussillous, P;Quéré, D
我们感兴趣的是在毛细管内移动液滴后留下的液体量。很久以前，Taylor就表明，对于以小速度运动的粘性很强的液体，薄膜厚度是毛细管数的单调递增函数。本文报道了用低粘度液体获得的新数据，并与泰勒定律进行了比较。观察到两个连续的效应：超过毛细管数的阈值，膜比泰勒膜厚；在非常高的速度下，沉积规律成为下降速度的递减函数。这两种行为都通过缩放论证进行了分析，并被证明是惯性的结果。(C) 2000年美国物理研究所。[S1070 - 6631(00) 00610 - 3]。
We are interested in the amount of fluid left behind a drop moved inside a capillary tube. Long ago, Taylor showed that for very viscous liquids moved at small velocities, the film thickness is a monotonic increasing function of the capillary number. New data obtained with liquids of low viscosity are reported here and compared with Taylor's law. Two successive effects are observed: above a threshold in capillary number, the film is thicker than a Taylor film; at a very high speed, the deposition law becomes a decreasing function of the drop velocity. Both behaviors are analyzed thanks to scaling arguments and shown to be consequences of inertia. (C) 2000 American Institute of Physics. [S1070- 6631(00)00610-3].