arXiv 2204.048042022-04physics.flu-dyn

破裂的液滴

Bursting Drops

Varun Kulkarni, Venkata Yashasvi Lolla, Suhas Tamvada, Sushant Anand

AI总结：

本研究揭示油滴在液—气界面破裂时的反向射流与主体内子液滴生成机制，阐明黏度和微粒的抑制作用，并展示其在 Pickering 液滴、双重乳液及雨滴撞膜研究中的应用。

摘要：

几十年来，世界各地的研究人员一直在研究与天然和人工石油泄漏相关的现象，例如水体中油滴的形成、油滴的上升，以及它们突破水—空气界面后油膜的演化。尽管如此，导致油膜形成的事件——油滴在液—气界面处的破裂——迄今仍未受到关注。在本研究中，我们对此进行了研究，并报告了一种反直觉的射流反转现象：它会在液体主体内部释放出一个子油滴，而不是像破裂的气泡那样观察到向上喷射的射流。我们表明，由此产生的子液滴尺寸可以与主体液体的性质相关联，并且通过提高主体黏度或添加微粒可以抑制其形成。我们进一步通过合成胶体 Pickering 液滴证明了研究结果的重要性，并展示了破裂复合液滴在双重乳液以及雨滴撞击油膜研究中的应用。这些结果可能会对包括气候学、海洋科学、大气科学、胶体合成和药物递送在内的多个领域产生巨大的变革作用。

英文摘要：

For decades, researchers worldwide have investigated phenomena related to natural, artificial oil leakages such as oil drop formation within water bodies, their rise, and oil slick evolution after they breach the water-air interface. Despite this, the event leading to slick formation -the bursting of oil drops at the liquid-air interface has remained unnoticed thus far. In this work, we investigate this and report a counterintuitive jetting reversal that releases a daughter oil droplet inside the bulk as opposed to the upwards shooting jets observed in bursting air bubbles. We show that the daughter droplet size thus produced can be correlated to the bulk liquid properties and that its formation can be suppressed by increasing the bulk viscosity or by the addition of microparticles. We further demonstrate the significance of our results by synthesizing colloidal pickered droplets and show applications of bursting compound drops in double emulsions and studies on raindrop impact on a slick. These results could be immensely transformative for diverse areas, including climatology, oceanic, atmospheric sciences, colloidal synthesis and drug delivery.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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摘要：

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