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Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces
Compared to the significant body of work devoted to surface engineering for promoting dropwise condensation heat transfer of steam, much less attention has been dedicated to fluids with lower interfacial tension. A vast array of low-surface tension fluids such as hydrocarbons, cryogens, and fluorina...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3942741/ https://www.ncbi.nlm.nih.gov/pubmed/24595171 http://dx.doi.org/10.1038/srep04158 |
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author | Rykaczewski, Konrad Paxson, Adam T. Staymates, Matthew Walker, Marlon L. Sun, Xiaoda Anand, Sushant Srinivasan, Siddarth McKinley, Gareth H. Chinn, Jeff Scott, John Henry J. Varanasi, Kripa K. |
author_facet | Rykaczewski, Konrad Paxson, Adam T. Staymates, Matthew Walker, Marlon L. Sun, Xiaoda Anand, Sushant Srinivasan, Siddarth McKinley, Gareth H. Chinn, Jeff Scott, John Henry J. Varanasi, Kripa K. |
author_sort | Rykaczewski, Konrad |
collection | PubMed |
description | Compared to the significant body of work devoted to surface engineering for promoting dropwise condensation heat transfer of steam, much less attention has been dedicated to fluids with lower interfacial tension. A vast array of low-surface tension fluids such as hydrocarbons, cryogens, and fluorinated refrigerants are used in a number of industrial applications, and the development of passive means for increasing their condensation heat transfer coefficients has potential for significant efficiency enhancements. Here we investigate condensation behavior of a variety of liquids with surface tensions in the range of 12 to 28 mN/m on three types of omniphobic surfaces: smooth oleophobic, re-entrant superomniphobic, and lubricant-impregnated surfaces. We demonstrate that although smooth oleophobic and lubricant-impregnated surfaces can promote dropwise condensation of the majority of these fluids, re-entrant omniphobic surfaces became flooded and reverted to filmwise condensation. We also demonstrate that on the lubricant-impregnated surfaces, the choice of lubricant and underlying surface texture play a crucial role in stabilizing the lubricant and reducing pinning of the condensate. With properly engineered surfaces to promote dropwise condensation of low-surface tension fluids, we demonstrate a four to eight-fold improvement in the heat transfer coefficient. |
format | Online Article Text |
id | pubmed-3942741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-39427412014-03-06 Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces Rykaczewski, Konrad Paxson, Adam T. Staymates, Matthew Walker, Marlon L. Sun, Xiaoda Anand, Sushant Srinivasan, Siddarth McKinley, Gareth H. Chinn, Jeff Scott, John Henry J. Varanasi, Kripa K. Sci Rep Article Compared to the significant body of work devoted to surface engineering for promoting dropwise condensation heat transfer of steam, much less attention has been dedicated to fluids with lower interfacial tension. A vast array of low-surface tension fluids such as hydrocarbons, cryogens, and fluorinated refrigerants are used in a number of industrial applications, and the development of passive means for increasing their condensation heat transfer coefficients has potential for significant efficiency enhancements. Here we investigate condensation behavior of a variety of liquids with surface tensions in the range of 12 to 28 mN/m on three types of omniphobic surfaces: smooth oleophobic, re-entrant superomniphobic, and lubricant-impregnated surfaces. We demonstrate that although smooth oleophobic and lubricant-impregnated surfaces can promote dropwise condensation of the majority of these fluids, re-entrant omniphobic surfaces became flooded and reverted to filmwise condensation. We also demonstrate that on the lubricant-impregnated surfaces, the choice of lubricant and underlying surface texture play a crucial role in stabilizing the lubricant and reducing pinning of the condensate. With properly engineered surfaces to promote dropwise condensation of low-surface tension fluids, we demonstrate a four to eight-fold improvement in the heat transfer coefficient. Nature Publishing Group 2014-03-05 /pmc/articles/PMC3942741/ /pubmed/24595171 http://dx.doi.org/10.1038/srep04158 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Rykaczewski, Konrad Paxson, Adam T. Staymates, Matthew Walker, Marlon L. Sun, Xiaoda Anand, Sushant Srinivasan, Siddarth McKinley, Gareth H. Chinn, Jeff Scott, John Henry J. Varanasi, Kripa K. Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title | Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title_full | Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title_fullStr | Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title_full_unstemmed | Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title_short | Dropwise Condensation of Low Surface Tension Fluids on Omniphobic Surfaces |
title_sort | dropwise condensation of low surface tension fluids on omniphobic surfaces |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3942741/ https://www.ncbi.nlm.nih.gov/pubmed/24595171 http://dx.doi.org/10.1038/srep04158 |
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