Pinch-off from a foam droplet in a Hele-Shaw cell
Pinch-off from a foam droplet in a Hele-Shaw cell
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Hele-Shaw 池中泡沫液滴的夹断
DOI：
10.1039/d1sm01268a
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发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Kurita Rei
中科院分区：
文献类型：
--
作者：
Tani Marie;Kurita Rei
在垂直表面上放置一些泡沫是普遍存在的情况，例如，如日常生活中的剃须和墙壁清洁，以及自然界中一些动物或昆虫的产卵或制作泡沫巢。在这种情况下，人们可能更希望泡沫保持在初始位置。此外，经由液体从泡沫底部夹断而损失溶液是不期望的。为了解决夹断条件和机制，我们进行了一个模型实验：我们将一定量的泡沫限制在Hele-Shaw单元中。在重力作用下，观察到两种下滑模式，有和没有液体夹断。我们制作了形态相图，并从理论上澄清了液体夹断从泡沫液滴的发病。
Placing some foam on a vertical surface is a ubiquitous situation, for example, such as in shaving and wall cleaning in daily life, and in egg-laying or making foam nests for some animals or insects in nature. In such a situation, one may prefer that the foam remains in the initial position. Moreover, losing solution via liquid pinch-off from the bottom of the foam is undesirable. To address the pinching off condition and mechanism, we conducted a model experiment: we confined an amount of foam in a Hele-Shaw cell. Two sliding down modes, both with and without liquid pinch-off, were observed under gravity. We fabricated morphology phase diagrams, and theoretically clarified the onset of liquid pinch-off from a foamy droplet.