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Issue 43, 2016, Issue in Progress
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Droplet migration during condensation on chemically patterned micropillars

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Abstract

We demonstrate the migration of small water droplets from the side wall of a micropillar onto its top surface during dropwise condensation without application of an external force. The observed droplet migration occurs due to the difference in wettability between the hydrophobic sides and hydrophilic top surfaces of the micropillars imposed by a novel fabrication process. The movement of condensate from the pillars' side walls onto their tops is suggested as a method for shifting condensate from a Wenzel to a Cassie-Baxter state to promote droplet detachment. In this communication, we also emphasize the use of combined surface texturing and wettability patterning to prompt the migration of condensate on pillars for the effective design of surfaces for high condensation heat transfer performance.

Graphical abstract: Droplet migration during condensation on chemically patterned micropillars

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Article information


Submitted
11 Feb 2016
Accepted
04 Apr 2016
First published
06 Apr 2016

RSC Adv., 2016,6, 36698-36704
Article type
Communication

Droplet migration during condensation on chemically patterned micropillars

D. Orejon, O. Shardt, P. R. Waghmare, N. S. Kumar Gunda, Y. Takata and S. K. Mitra, RSC Adv., 2016, 6, 36698
DOI: 10.1039/C6RA03862J

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