Theoretical and Three-Dimensional Molecular Dynamics Study of Droplet Wettability and Mobility on Lubricant-Infused Porous Surfaces
(2023) In Langmuir 39(37). p.13371-13385- Abstract
Profiting from their slippery nature, lubricant-infused porous surfaces endow with droplets excellent mobility and consequently promise remarkable heat transfer improvement for dropwise condensation. To be a four-phase wetting system, the droplet wettability configurations and the corresponding dynamic characteristics on lubricant-infused porous surfaces are closely related to many factors, such as multiple interfacial interactions, surface features, and lubricant thickness, which keeps a long-standing challenge to promulgate the underlying physics. In this work, thermodynamically theoretical analysis and three-dimensional molecular dynamics simulations with the coarse-grained water and hexane models are carried out to explore droplet... (More)
Profiting from their slippery nature, lubricant-infused porous surfaces endow with droplets excellent mobility and consequently promise remarkable heat transfer improvement for dropwise condensation. To be a four-phase wetting system, the droplet wettability configurations and the corresponding dynamic characteristics on lubricant-infused porous surfaces are closely related to many factors, such as multiple interfacial interactions, surface features, and lubricant thickness, which keeps a long-standing challenge to promulgate the underlying physics. In this work, thermodynamically theoretical analysis and three-dimensional molecular dynamics simulations with the coarse-grained water and hexane models are carried out to explore droplet wettability and mobility on lubricant-infused porous surfaces. Combined with accessible theoretical criteria, phase diagrams of droplet configurations are constructed with a comprehensive consideration of interfacial interactions, surface structures, and lubricant thickness. Subsequently, droplet sliding and coalescence dynamics are quantitatively defined under different configurations. Finally, in terms of the promotion of dropwise condensation, a non-cloaking configuration with the encapsulated state underneath the droplet is recommended to achieve high droplet mobility owing to the low viscous drag of the lubricant and the eliminated pinning effect of the contact line. On the basis of the low oil-water and water-solid interactions, a stable lubricant layer with a relatively low thickness is suggested to construct slippery surfaces.
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- author
- Zheng, Shao Fei ; Gao, Yi Ying ; Yang, Li Tao ; Gao, Shu Rong ; Yang, Yan Ru ; Lee, Duu Jong ; Sunden, Bengt LU and Wang, Xiao Dong
- organization
- publishing date
- 2023-09-19
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 39
- issue
- 37
- pages
- 15 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:37675482
- scopus:85171806713
- ISSN
- 0743-7463
- DOI
- 10.1021/acs.langmuir.3c02078
- language
- English
- LU publication?
- yes
- id
- 30545b97-35ea-4d9e-b6ff-d0f73fa7e243
- date added to LUP
- 2024-01-12 12:28:54
- date last changed
- 2024-04-13 05:56:13
@article{30545b97-35ea-4d9e-b6ff-d0f73fa7e243,
abstract = {{<p>Profiting from their slippery nature, lubricant-infused porous surfaces endow with droplets excellent mobility and consequently promise remarkable heat transfer improvement for dropwise condensation. To be a four-phase wetting system, the droplet wettability configurations and the corresponding dynamic characteristics on lubricant-infused porous surfaces are closely related to many factors, such as multiple interfacial interactions, surface features, and lubricant thickness, which keeps a long-standing challenge to promulgate the underlying physics. In this work, thermodynamically theoretical analysis and three-dimensional molecular dynamics simulations with the coarse-grained water and hexane models are carried out to explore droplet wettability and mobility on lubricant-infused porous surfaces. Combined with accessible theoretical criteria, phase diagrams of droplet configurations are constructed with a comprehensive consideration of interfacial interactions, surface structures, and lubricant thickness. Subsequently, droplet sliding and coalescence dynamics are quantitatively defined under different configurations. Finally, in terms of the promotion of dropwise condensation, a non-cloaking configuration with the encapsulated state underneath the droplet is recommended to achieve high droplet mobility owing to the low viscous drag of the lubricant and the eliminated pinning effect of the contact line. On the basis of the low oil-water and water-solid interactions, a stable lubricant layer with a relatively low thickness is suggested to construct slippery surfaces.</p>}},
author = {{Zheng, Shao Fei and Gao, Yi Ying and Yang, Li Tao and Gao, Shu Rong and Yang, Yan Ru and Lee, Duu Jong and Sunden, Bengt and Wang, Xiao Dong}},
issn = {{0743-7463}},
language = {{eng}},
month = {{09}},
number = {{37}},
pages = {{13371--13385}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Theoretical and Three-Dimensional Molecular Dynamics Study of Droplet Wettability and Mobility on Lubricant-Infused Porous Surfaces}},
url = {{http://dx.doi.org/10.1021/acs.langmuir.3c02078}},
doi = {{10.1021/acs.langmuir.3c02078}},
volume = {{39}},
year = {{2023}},
}