Flows around confined bubbles and their importance in triggering pinch-off.
Flows around confined bubbles and their importance in triggering pinch-off.
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DOI：
10.1103/physrevlett.103.214501
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发表时间：
2009-11
影响因子：
8.6
通讯作者：
V. van Steijn;C. Kleijn;M. Kreutzer
中科院分区：
文献类型：
--
作者：
V. van Steijn;C. Kleijn;M. Kreutzer
我们描述了毛细管数Ca < 10{-2}时液体横流中受限气体线的断裂。破裂不是由高原-瑞利不稳定性引起的，而是由液体从线的尖端流到发生挤压的颈部引起的。这种流动比先前估计的要快，它是由尖端和颈部的不同曲率驱动的，并穿过螺纹和通道壁之间的大间隙。了解这些曲率在气泡形成过程中是如何演变的，可以准确地预测出夹断的时刻。
We describe the breakup of a confined gas thread in a cross-flowing stream of liquid at capillary numbers Ca < 10{-2}. The breakup is initiated, not by a Plateau-Rayleigh instability, but by liquid that flows from the tip of the thread to the neck where pinch-off occurs. This flow, faster than previously estimated, is driven by different curvatures at the tip and neck and runs through large gaps between thread and channel walls. Understanding how these curvatures evolve during bubble formation leads to accurate predictions of the moment of pinch-off.