Cavitation-induced microjets tuned by channels with alternating wettability patterns
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2301.10084.pdf
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15.2 MB
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Author(s)
Schoppink, Jelle J.
Mohan, Keerthana
Quetzeri-Santiago, Miguel A.
McKinley, Gareth
Rivas, David Fernandez
Dickerson, Andrew K.
Date Issued
March 1, 2023
Journal
Physics of Fluids
Publisher
AIP Publishing
Citation
Schoppink, Jelle J., Mohan, Keerthana, Quetzeri-Santiago, Miguel A., McKinley, Gareth, Rivas, David Fernandez et al. 2023. "Cavitation-induced microjets tuned by channels with alternating wettability patterns." Physics of Fluids, 35 (3).
Version
Author's final manuscript
Abstract
A laser pulse focused near the closed end of a glass capillary partially filled with water creates a vapor bubble and an associated pressure wave. The pressure wave travels through the liquid toward the meniscus where it is reflected, creating a fast, focused microjet. In this study, we selectively coat the hydrophilic glass capillaries with hydrophobic strips along the capillary. The result after filling the capillary is a static meniscus which has a curvature markedly different than an unmodified capillary. This tilting asymmetry in the static meniscus alters the trajectory of the ensuing jets. The hydrophobic strips also influence the advancing contact line and receding contact line as the vapor bubble expands and collapses. We present thirteen different permutations of this system which includes three geometries and four coating schemes. The combination of geometry and coatings influences the jet breakup, the resulting drop size distribution, the trajectory of the jet tip, and the consistency of jet characteristics across trials. The inclusion of hydrophobic strips promotes jetting in line with the channel axis, with the most effective arrangement dependent on channel size.
Subjects
Condensed Matter Physics
Fluid Flow and Transfer Processes
Mechanics of Materials
Computational Mechanics
Mechanical Engineering
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-ShareAlike
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DOI of Published Version
https://doi.org/10.1063/5.0143223
