Thermocapillary motion on lubricant-impregnated surfaces
Name
PhysRevFluids.1.063902.pdf
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1.1 MB
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Author(s)
Quéré, David
Bjelobrk, Nada
Girard, Henri-Louis
Bengaluru Subramanyam, Srinivas Prasad
Kwon, HyukMin
Varanasi, Kripa
Date Issued
October 2016
Journal
Physical Review Fluids
Publisher
American Physical Society (APS)
Citation
Bjelobrk, Nada et al. “Thermocapillary Motion on Lubricant-Impregnated Surfaces.” Physical Review Fluids 1, 6 (October 2016): 06302 © 2016 American Physical Society
Version
Final published version
Abstract
We show that thermocapillary-induced droplet motion is markedly enhanced when using lubricant-impregnated surfaces as compared to solid substrates. These surfaces provide weak pinning, which makes them ideal for droplet transportation and specifically for water transportation. Using a lubricant with viscosity comparable to that of water and temperature gradients as low as 2 K/mm, we observe that drops can propel at 6.5 mm/s, that is, at least 5 times quicker than reported on conventional substrates. Also in contrast with solids, the liquid nature of the different interfaces makes it possible to predict quantitatively the thermocapillary Marangoni force (and velocity) responsible for the propulsion.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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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/PHYSREVFLUIDS.1.063902
