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dc.contributor.authorBudaklı, Mete
dc.contributor.authorSalem, Thamer K.
dc.contributor.authorArık, Mehmet
dc.contributor.authorDönmez, Barca
dc.contributor.authorMenceloğlu, Yusuf
dc.date.accessioned2021-01-08T21:51:30Z
dc.date.available2021-01-08T21:51:30Z
dc.date.issued2021
dc.identifier.issn0735-1933
dc.identifier.urihttps://doi.org/10.1016/j.icheatmasstransfer.2020.105063
dc.identifier.urihttps://hdl.handle.net/20.500.12846/314
dc.description.abstractIn this study, condensation characteristics of water vapor on micro-structured surfaces at different pressures and subcooling temperature has been investigated experimentally. This work represents a basic study in order to design a secondary evaporator section in a refrigeration cycle. A set of surfaces has been manufactured over copper substrates with one sample used as unstructured (smooth) reference surface and two micro-structured surfaces with longitudinal grooves having V-shape and square cross-sections. As the second step, the surfaces have been modified by using a polymer coating to achieve stronger hydrophobicity at the surface and hence to influence wettability such that increased heat transfer rates should be reached. The polymer coating has been created with a dip coating process by applying a mixture of perfluoroalkyl triethoxysilane. Concerning the wettability, a high-speed flow visualization study has been performed for the interpretation of heat transfer results. Experimental results showed that an increase in the droplet contact angle by applying the polymer coating over surfaces, while the largest droplet contact angle was obtained (130.9°±2.0°) for the surface with V-shaped micro-structuring compared to other surfaces. The comparison of heat transfer performance reveals an enhancement in heat transfer coefficient for the coated version of unstructured, square-grooved and V-grooved surface by 34.5%, 61.8%, and 73.4%, respectively. © 2020 Elsevier Ltden_US
dc.description.sponsorshipConsejo Nacional para Investigaciones Científicas y Tecnológicas, CONICIT Seventh Framework Programme, FP7: 116C027 Marie Curieen_US
dc.description.sponsorshipThis project has been funded by the Scientific and Technological Research Council in Turkey (TÜBİTAK), co-funded by the Marie Curie Actions under FP7 (Research Grant No. 116C027 ). The corresponding author would like to thank both institutions for their support. Many thanks also to Ozyegin University EVATEG center and Sabanci University for utilizing infrastructure for the experiments and for the preparation of the surface coatings, respectively.en_US
dc.language.isoengen_US
dc.publisherElsevier Ltden_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCondensationen_US
dc.subjectElectronics coolingen_US
dc.subjectHeat transferen_US
dc.subjectHydrophobicityen_US
dc.subjectMicro-structuringen_US
dc.subjectPolymer coatingen_US
dc.subjectThermal managementen_US
dc.subjectWettabilityen_US
dc.titleAn experimental study on the heat transfer and wettability characteristics of micro-structured surfaces during water vapor condensation under different pressure conditionsen_US
dc.typearticleen_US
dc.relation.journalInternational Communications in Heat and Mass Transferen_US
dc.identifier.volume120en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.contributor.departmentTAÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümüen_US
dc.contributor.institutionauthorBudaklı, Mete
dc.identifier.doi10.1016/j.icheatmasstransfer.2020.105063


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