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The condensation ch...
The condensation characteristics of individual droplets during dropwise condensation
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- Zheng, Shao Fei (författare)
- North China Electric Power University
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- Wu, Zi Yi (författare)
- North China Electric Power University
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- Liu, Guo Qing (författare)
- North China Electric Power University
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- Yang, Yan Ru (författare)
- North China Electric Power University
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- Sundén, Bengt (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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- Wang, Xiao Dong (författare)
- North China Electric Power University
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: International Communications in Heat and Mass Transfer. - : Elsevier BV. - 0735-1933. ; 131
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Recently, nonwetting surfaces have attracted explosive attention in the community of dropwise condensation. Prediction models have been used to improve the fundamental understanding of dropwise condensation heat transfer. However, the multiscale heat transfer characteristics of individual droplets and the quantitative heat transfer evaluation of the droplet growth on different condensing surfaces are rarely carried out for dropwise condensation, which are focused on in this work. Based on the droplet heat transfer models, we consider three respective groups of nonwetting surfaces (hydrophobic surfaces, structured superhydrophobic surfaces, and slippery surfaces) in a pure vapor environment, as well as the presence of non-condensable gas (NCG). We first elucidate the dynamic roles that the thermal resistances have in the intrinsically multiscale droplets during condensation. The resulting heat transfer characteristics of droplets are understood simultaneously. We highlight that two critical sizes of the droplet significantly characterizes the condensation behaviors of droplets, and three regions are defined to characterize the dependence of the droplet size on the dominant thermal driving loss. Subsequently, the droplet size distribution is considered to further understand the role of dynamically growing droplets on the total thermal resistance. In the presence of NCG, over the whole size range of droplets, the dynamic roles of the thermal resistances and the heat transfer characteristics are significantly changed due to the resulting diffusion resistance.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Nyckelord
- Droplet
- Dropwise condensation
- Heat and mass transfer
- Nonwetting surfaces
- Thermal resistances
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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