Jet drops from bursting bubbles: How gravity and viscosity couple to inhibit droplet production
Jet drops from bursting bubbles: How gravity and viscosity couple to inhibit droplet production
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DOI：
10.1103/physreve.92.021002
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发表时间：
2015-08-17
影响因子：
2.4
通讯作者：
Bird, James C.
中科院分区：
文献类型：
--
作者：
Walls, Peter L. L.;Henaux, Louis;Bird, James C.
当气泡在液体表面破裂时，塌陷的空腔产生中心射流，该射流经常分裂成一系列液滴。目前的实验和理论预测，喷射液滴的产生将受到粘性或重力效应的限制。然而，虽然有一些研究集中在这两个限制的情况下，了解较少的是关于生产的射流滴时，重力和粘性的影响是显着的。在这里，我们发现存在一个中间区域，重力和粘性效应在喷射液滴形成中起着关键作用。我们建议，重力的作用是最重要的破裂前，并进行模拟，证明了在生产的射流滴的平衡气泡形状的重要性。
When a bubble ruptures at a liquid surface the collapsing cavity produces a central jet that frequently breaks up into a series of droplets. Current experiment and theory predict that the production of jet drops will be limited by either viscous or gravitational effects. However, while there are a number of studies focusing on these two limiting cases, less is understood about the production of jet drops when both gravitational and viscous effects are significant. Here, we uncover the existence of an intermediate region where both gravitational and viscous effects play a critical role in jet-drop formation. We propose that the role of gravity is most important before rupture, and carry out simulations that demonstrate the importance of the equilibrium bubble shape in the production of jet drops.