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Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface

[Image: see text] This paper studied the coalescence, spreading, and rebound of two droplets with different temperatures on a superhydrophobic surface. When the temperature of the impacting droplet was the same as that of the stationary droplet, there was a large deformation of both droplets before...

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Autores principales: Xu, Hao, Chang, Chao, Yi, Nan, Tao, Peng, Song, Chengyi, Wu, Jianbo, Deng, Tao, Shang, Wen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6822121/
https://www.ncbi.nlm.nih.gov/pubmed/31681868
http://dx.doi.org/10.1021/acsomega.9b01181
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author Xu, Hao
Chang, Chao
Yi, Nan
Tao, Peng
Song, Chengyi
Wu, Jianbo
Deng, Tao
Shang, Wen
author_facet Xu, Hao
Chang, Chao
Yi, Nan
Tao, Peng
Song, Chengyi
Wu, Jianbo
Deng, Tao
Shang, Wen
author_sort Xu, Hao
collection PubMed
description [Image: see text] This paper studied the coalescence, spreading, and rebound of two droplets with different temperatures on a superhydrophobic surface. When the temperature of the impacting droplet was the same as that of the stationary droplet, there was a large deformation of both droplets before the coalescence and the energy dissipation was also large. The coalescence happened at the time close to the maximum spreading. When the temperature of the impacting droplet increased, the deformation of both droplets became smaller before the coalescence and the coalescence happened at or even before the droplets started to spread. The energy dissipation and loss in the later situation is less than those in the previous case. The rebounding characteristics of the merged droplets were also found to be dependent on the temperature. There is an optimum temperature at which the merged droplets can rebound for more times due to the balance of energy loss and also the interaction of the merged droplets with the underlying superhydrophobic substrate. These findings may help further the fundamental understanding of droplet collision on a superhydrophobic surfaces and also offer an alternative strategy to remove droplets from the underlying surfaces for different industrial applications, including condensation heat transfer in steam power plants and phase-change-based thermal management systems.
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spelling pubmed-68221212019-11-01 Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface Xu, Hao Chang, Chao Yi, Nan Tao, Peng Song, Chengyi Wu, Jianbo Deng, Tao Shang, Wen ACS Omega [Image: see text] This paper studied the coalescence, spreading, and rebound of two droplets with different temperatures on a superhydrophobic surface. When the temperature of the impacting droplet was the same as that of the stationary droplet, there was a large deformation of both droplets before the coalescence and the energy dissipation was also large. The coalescence happened at the time close to the maximum spreading. When the temperature of the impacting droplet increased, the deformation of both droplets became smaller before the coalescence and the coalescence happened at or even before the droplets started to spread. The energy dissipation and loss in the later situation is less than those in the previous case. The rebounding characteristics of the merged droplets were also found to be dependent on the temperature. There is an optimum temperature at which the merged droplets can rebound for more times due to the balance of energy loss and also the interaction of the merged droplets with the underlying superhydrophobic substrate. These findings may help further the fundamental understanding of droplet collision on a superhydrophobic surfaces and also offer an alternative strategy to remove droplets from the underlying surfaces for different industrial applications, including condensation heat transfer in steam power plants and phase-change-based thermal management systems. American Chemical Society 2019-10-14 /pmc/articles/PMC6822121/ /pubmed/31681868 http://dx.doi.org/10.1021/acsomega.9b01181 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Xu, Hao
Chang, Chao
Yi, Nan
Tao, Peng
Song, Chengyi
Wu, Jianbo
Deng, Tao
Shang, Wen
Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title_full Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title_fullStr Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title_full_unstemmed Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title_short Coalescence, Spreading, and Rebound of Two Water Droplets with Different Temperatures on a Superhydrophobic Surface
title_sort coalescence, spreading, and rebound of two water droplets with different temperatures on a superhydrophobic surface
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6822121/
https://www.ncbi.nlm.nih.gov/pubmed/31681868
http://dx.doi.org/10.1021/acsomega.9b01181
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