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dc.contributor.authorSouza, R. R.
dc.contributor.authorCardoso, E. M. [UNESP]
dc.contributor.authorPassos, J. C.
dc.date.accessioned2018-12-11T17:15:47Z
dc.date.available2018-12-11T17:15:47Z
dc.date.issued2018-02-01
dc.identifierhttp://dx.doi.org/10.1016/j.expthermflusci.2017.10.029
dc.identifier.citationExperimental Thermal and Fluid Science, v. 91, p. 312-319.
dc.identifier.issn0894-1777
dc.identifier.urihttp://hdl.handle.net/11449/175426
dc.description.abstractThis article presents experimental results for the confined and unconfined nucleate boiling of saturated HFE7100 (C4F9OCH3) at atmospheric pressure and using nanostructured copper discs as heating surfaces. The nanostructures studied consisted of nanoparticles of maghemite (Fe2O3) on the heating surface, comprised of a copper disc. Different values for the diameter (10 and 80 nm) and roughness (Ra = 0.02 µm and 0.16 µm) were studied. The nanoparticle adhesion on the heating surface plays a more important role in the confined boiling process than the surface roughness. As an original result, it was demonstrated that for a confinement with a gap length of 0.1 mm and heat flux of 40 kW/m2 the heat transfer coefficient (HTC) increased by 31% and 100% for the cases with the deposition of nanoparticles of 10 nm and 80 nm, respectively. However, without the nanoparticles the HTC decreased by 21% when compared with the reference case, that is, a smooth plate (Ra = 0.02 µm) and unconfined boiling.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent312-319
dc.language.isoeng
dc.relation.ispartofExperimental Thermal and Fluid Science
dc.sourceScopus
dc.subjectConfined nucleate boiling
dc.subjectHeat transfer coefficient
dc.subjectNanoparticle size
dc.subjectSurface roughness
dc.titleConfined and unconfined nucleate boiling of HFE7100 in the presence of nanostructured surfacesen
dc.typeArtigo
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationDepartment of Mechanical Engineering LEPTEN - Laboratory of Process Engineering and Energy Technology Federal University of Santa Catarina
dc.description.affiliationUNESP - Univ Estadual Paulista Department of Mechanical Engineering, Av. Brasil Centro, 56, 15385-000 Ilha Solteira
dc.description.affiliationUnespUNESP - Univ Estadual Paulista Department of Mechanical Engineering, Av. Brasil Centro, 56, 15385-000 Ilha Solteira
dc.identifier.doi10.1016/j.expthermflusci.2017.10.029
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-85032815621
dc.identifier.file2-s2.0-85032815621.pdf
dc.relation.ispartofsjr1,271
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