Controlled liquid entrapment over patterned sidewalls in confined geometries
Author(s)
Gupta, Ankur; Lee, Hyundo; Doyle, Patrick S
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Liquid entrapment over patterned surfaces has applications in diagnostics, oil recovery, and printing processes. Here we study the process of oil displacement upon sequential injection of water over a photopatterned structure in a confined geometry. By varying the amplitude and frequency of triangular and sinusoidal patterns, we are able to completely remove oil or trap oil in varying amounts. We present a theoretical model based on geometrical arguments that successfully predicts the criterion for liquid entrapment and provides insights into the parameters that govern the physical process.
Date issued
2017-09Department
Massachusetts Institute of Technology. Department of Chemical Engineering; Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
Physical Review Fluids
Publisher
American Physical Society
Citation
Gupta, Ankur, et al. “Controlled Liquid Entrapment over Patterned Sidewalls in Confined Geometries.” Physical Review Fluids, vol. 2, no. 9, Sept. 2017. © 2017 American Physical Society
Version: Final published version
ISSN
2469-990X
2469-9918