Self-propelled sweeping removal of dropwise condensate

Qu, Xiaopeng; Boreyko, Jonathan; Liu, Fangjie; Agapov, Rebecca L.; Lavrik, Nickolay V.; Retterer, Scott T.; Feng, James; Collier, Pat; Chen, Chuan-Hua

doi:10.1063/1.4921923

Title: Self-propelled sweeping removal of dropwise condensate

Journal Article · Tue Jun 02 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4921923· OSTI ID:1187922

Qu, Xiaopeng ^[1]; Boreyko, Jonathan ^[2]; Liu, Fangjie ^[1]; Agapov, Rebecca L. ^[3]; Lavrik, Nickolay V. ^[3]; Retterer, Scott T. ^[3]; Feng, James ^[4]; Collier, Pat ^[3]; Chen, Chuan-Hua ^[1]

Duke Univ., Durham, NC (United States)
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
University of British Columbia, Vancouver

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.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1187922

Journal Information:: Applied Physics Letters, Vol. 160, Issue 22; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

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