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Title: Self-propelled sweeping removal of dropwise condensate

Abstract

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.

Authors:
 [1];  [2];  [1];  [3];  [3];  [3];  [4];  [3];  [1]
  1. Duke Univ., Durham, NC (United States)
  2. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. University of British Columbia, Vancouver
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1187922
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 160; Journal Issue: 22; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Qu, Xiaopeng, Boreyko, Jonathan, Liu, Fangjie, Agapov, Rebecca L., Lavrik, Nickolay V., Retterer, Scott T., Feng, James, Collier, Pat, and Chen, Chuan-Hua. Self-propelled sweeping removal of dropwise condensate. United States: N. p., 2015. Web. doi:10.1063/1.4921923.
Qu, Xiaopeng, Boreyko, Jonathan, Liu, Fangjie, Agapov, Rebecca L., Lavrik, Nickolay V., Retterer, Scott T., Feng, James, Collier, Pat, & Chen, Chuan-Hua. Self-propelled sweeping removal of dropwise condensate. United States. https://doi.org/10.1063/1.4921923
Qu, Xiaopeng, Boreyko, Jonathan, Liu, Fangjie, Agapov, Rebecca L., Lavrik, Nickolay V., Retterer, Scott T., Feng, James, Collier, Pat, and Chen, Chuan-Hua. 2015. "Self-propelled sweeping removal of dropwise condensate". United States. https://doi.org/10.1063/1.4921923. https://www.osti.gov/servlets/purl/1187922.
@article{osti_1187922,
title = {Self-propelled sweeping removal of dropwise condensate},
author = {Qu, Xiaopeng and Boreyko, Jonathan and Liu, Fangjie and Agapov, Rebecca L. and Lavrik, Nickolay V. and Retterer, Scott T. and Feng, James and Collier, Pat and Chen, Chuan-Hua},
abstractNote = {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.},
doi = {10.1063/1.4921923},
url = {https://www.osti.gov/biblio/1187922}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 22,
volume = 160,
place = {United States},
year = {Tue Jun 02 00:00:00 EDT 2015},
month = {Tue Jun 02 00:00:00 EDT 2015}
}

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