How Does an Air Film Evolve into a Bubble During Drop Impact?
SCIE
SCOPUS
- Title
- How Does an Air Film Evolve into a Bubble During Drop Impact?
- Authors
- Lee, JS; Byung Mook Weon; Je, JH; Fezzaa, K
- Date Issued
- 2012-11-13
- Publisher
- American Physical Society
- Abstract
- When a liquid drop impacts a solid surface, air is generally entrapped underneath. Using ultrafast x-ray phase-contrast imaging, we directly visualized the profile of an entrapped air film and its evolution into a bubble during drop impact. We identified a complicated evolution process that consists of three stages: inertial retraction of the air film, contraction of the top air surface into a bubble, and pinch-off of a daughter droplet inside the bubble. Energy transfer during retraction drives the contraction and pinch-off of a daughter droplet. The wettability of the solid surface affects the detachment of the bubble, suggesting a method for bubble elimination in many drop-impact applications.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12499
- DOI
- 10.1103/PHYSREVLETT.109.204501
- ISSN
- 0031-9007
- Article Type
- Article
- Citation
- PHYSICAL REVIEW LETTERS, vol. 109, no. 20, 2012-11-13
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