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Air evolution during drop impact on liquid pool

Title
Air evolution during drop impact on liquid pool
Authors
Lee J.S.Weon B.M.Park S.J.Kim J.T.Pyo J.Fezzaa K.Je J.H.
Date Issued
2020-04
Publisher
NATURE PUBLISHING GROUP
Abstract
We elucidate the evolution of the entrained air in drop impact on a wide range of liquids, using ultrafast X-ray phase-contrast imaging. We elaborate the retraction mechanism of the entrapped air film in terms of liquid viscosity. We found the criterion for deciding if the entrapped air evolves into single or double bubbles, as determined by competition among inertia, capillarity, and viscosity. Low viscosity and low surface tension induce a small daughter droplet encapsulated by a larger air shell bubble, forming an antibubble. We demonstrate a phase diagram for air evolution regarding hydrodynamics.
URI
https://oasis.postech.ac.kr/handle/2014.oak/105615
ISSN
2045-2322
Article Type
Article
Citation
SCIENTIFIC REPORTS, vol. 10, no. 1, 2020-04
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제정호JE, JUNG HO
Dept of Materials Science & Enginrg
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