Decoupling the Influence of Surface Structure and Intrinsic Wettability on Boiling Heat Transfer

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dc.contributor.ORCID0000-0001-5050-2867 (Dai, X)
dc.contributor.VIAF308247739 (Dai, X
dc.contributor.authorDai, Xianming (Simon)
dc.contributor.authorWang, P.
dc.contributor.authorYang, F.
dc.contributor.authorLi, X.
dc.contributor.authorLi, C.
dc.contributor.utdAuthorDai, Xianming (Simon)
dc.date.accessioned2019-05-31T22:29:50Z
dc.date.available2019-05-31T22:29:50Z
dc.date.created2018-06-20
dc.descriptionIncludes supplementary material
dc.description.abstractSurface structure and intrinsic wettability are both important for boiling heat transfer. While superhydrophilic micro, nano, and hierarchical surfaces are widely used for boiling enhancement, in which the surface structure and intrinsic wettability usually couple together. This study aims to decouple their influences on boiling heat transfer. Copper meshes are utilized as the microporous structures, and conformal superhydrophilic films of TiO₂ are deposited by atomic layer deposition (ALD). Although ALD coatings for boiling have been done on flat surfaces, this study separates the influence of surface structure from that of intrinsic wettability on a three-dimensional microporous surface. By comparing two and four layer meshes, we show that the surface structure has no obvious influence on the critical heat flux (CHF), but can significantly enhance the heat transfer coefficient (HTC). The intrinsic superhydrophilicity dramatically increases the CHF due to the fast rewetting of dryout regions. Our conclusion is that fast rewetting is critical to increase the CHF, while large surface areas are vital to enhance the HTC. © 2018 Author(s).
dc.description.departmentErik Jonsson School of Engineering and Computer Science
dc.description.sponsorshipElectric Power Research Institute (EPRI 1-108059-01-05)
dc.identifier.bibliographicCitationDai, X., P. Wang, F. Yang, X. Li, et al. 2018. "Decoupling the influence of surface structure and intrinsic wettability on boiling heat transfer." Applied Physics Letters 112(25), doi:10.1063/1.5030420
dc.identifier.issn0003-6951
dc.identifier.issue25
dc.identifier.urihttps://hdl.handle.net/10735.1/6548
dc.identifier.volume112
dc.language.isoen
dc.publisherAmerican Institute of Physics Inc.
dc.relation.urihttp://dx.doi.org/10.1063/1.5030420
dc.rights©2018 The Authors
dc.source.journalApplied Physics Letters
dc.subjectAtomic layer deposition
dc.subjectHeat flux
dc.subjectHeat—Transmission
dc.subjectTitanium dioxide
dc.subjectWetting
dc.subjectNusselt number
dc.titleDecoupling the Influence of Surface Structure and Intrinsic Wettability on Boiling Heat Transfer
dc.type.genrearticle

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