Self-propelled sweeping removal of dropwise condensate

Journal Article (Journal Article)

Dropwise condensation can be enhanced by superhydrophobic surfaces on which the condensate drops spontaneously jump upon coalescence. However, the self-propelled jumping in prior reports is mostly perpendicular to the substrate. Here, we propose a substrate design with regularly spaced micropillars. Coalescence on the sidewalls of the micropillars leads to self-propelled jumping in a direction nearly orthogonal to the pillars and therefore parallel to the substrate. This in-plane motion in turn produces sweeping removal of multiple neighboring drops. The spontaneous sweeping mechanism may greatly enhance dropwise condensation in a self-sustained manner.

Full Text

Duke Authors

Cited Authors

  • Qu, X; Boreyko, JB; Liu, F; Agapov, RL; Lavrik, NV; Retterer, ST; Feng, JJ; Collier, CP; Chen, CH

Published Date

  • June 1, 2015

Published In

Volume / Issue

  • 106 / 22

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.4921923

Citation Source

  • Scopus