Dynamics of an oscillating bubble in a narrow gap
Name
Azam-2013-Dynamics of an.pdf
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Author(s)
Azam, Fahad Ibn
Karri, Badarinath
Ohl, Siew-Wan
Klaseboer, Evert
Khoo, Boo Cheong
Date Issued
October 2013
Journal
Physical Review E
Publisher
American Physical Society
Citation
Azam, Fahad Ibn, Badarinath Karri, Siew-Wan Ohl, Evert Klaseboer, and Boo Cheong Khoo. “Dynamics of an oscillating bubble in a narrow gap.” Physical Review E 88, no. 4 (October 2013). © 2013 American Physical Society
Version
Final published version
Abstract
The complex dynamics of a single bubble of a few millimeters in size oscillating inside a narrow fluid-filled gap between two parallel plates is studied using high-speed videography. Two synchronized high-speed cameras were used to observe both the side and front views of the bubble. The front-view images show bubble expansion and collapse with the formation of concentric dark and bright rings. The simultaneous recordings reveal the mechanism behind these rings. The side-view images reveal two different types of collapse behavior of the bubble including a previously unreported collapse phenomenon that is observed as the gap width is changed. At narrow widths, the bubble collapses towards the center of the gap; when the width is increased, the bubble splits before collapsing towards the walls. The bubble dynamics is also observed to be unaffected by the hydrophobic or hydrophilic nature of the plate surface due to the presence of a thin film of liquid between each of the plates and the bubble throughout the bubble lifetime. It is revealed that such systems do not behave as quasi-two-dimensional systems; three-dimensional effects are important.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Singapore-MIT Alliance in Research and Technology (SMART)
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.88.043006
