Visualization of droplet departure on a superhydrophobic surface and implications to heat transfer enhancement during dropwise condensation

C. Dietz, K. Rykaczewski, A. G. Fedorov, Y. Joshi

Research output: Contribution to journalArticle

204 Scopus citations

Abstract

Droplet departure frequency is investigated using environmental scanning electron microscopy with implications to enhancing the rate of dropwise condensation on superhydrophobic surfaces. Superhydrophobic surfaces, formed by cupric hydroxide nanostructures, allow the condensate to depart from a surface with a tilt angle of 30° from the horizontal. The resulting decrease in drop departure size shifts the drop size distribution to smaller radii, which may enhance the heat transfer rate during dropwise condensation. The heat transfer enhancement is estimated by modifying the Rose and Le Fevre drop distribution function to account for a smaller maximum droplet size on a superhydrophobic surface.

Original languageEnglish (US)
Article number033104
JournalApplied Physics Letters
Volume97
Issue number3
DOIs
StatePublished - Jul 19 2010
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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