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Analysıs Of Heat Transfer Enhancement In Tubes Wıth Capsule Dımpled Surfaces And Al2o3-Water Nanofluıd

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dc.contributor.author Yapıcı Özgirgin, Ekin
dc.contributor.author Haj İbrahim, Mahmoud Awni
dc.contributor.author Türkoğlu, Haşmet
dc.date.accessioned 2024-02-28T12:17:37Z
dc.date.available 2024-02-28T12:17:37Z
dc.date.issued 2022
dc.identifier.citation Yapıcı Özgirgin, Ekin; Haj İbrahim, Mahmoud Awn; Türkoğlu, H. (2022). "Analysıs Of Heat Transfer Enhancement In Tubes Wıth Capsule Dımpled Surfaces And Al2o3-Water Nanofluıd", Isı Bilimi ve Tekniği Dergisi, Vol.42, No.2, pp.269-280. tr_TR
dc.identifier.issn 1300-3615
dc.identifier.uri http://hdl.handle.net/20.500.12416/7346
dc.description.abstract This study aims to numerically investigate and evaluate the enhancement of heat transfer by new capsule dimples on tube surfaces for flow of water and Al2O3-water nanofluid with different concentrations, under uniform surface heat flux. The originality of this work lies in combining two passive heat transfer enhancement methods such as geometrical improvements and nanofluids together. Capsule dimples with different depths were considered. Al2O3-water nanofluid was modeled as a single-phase flow based on the mixture properties. The effects of dimple depth and nanoparticle concentrations on Nusselt number, friction factor and performance evaluation criteria (PEC) were studied. Numerical computations were performed using ANSYS Fluent commercial software for 2000 14000 Reynolds number range. It was found that when laminar, transient and fully developed turbulent flow cases are considered, increase in the dimple depth increases the Nusselt number and friction factor for both pure water and Al2O3-water nanofluids cases. Also, the friction factor increases as dimple depth increases. Results show that increase in PEC is more pronounced in the laminar region than in the transition region, it starts to decrease for turbulent flows. For nanofluid, PEC values are considerably higher than pure water cases. The variation of PEC for capsule dimpled tubes are dependent on flow regimes and dimple depths. Increasing the nano particle volume concentration and dimple depth in laminar flows increase the PEC significantly. tr_TR
dc.language.iso eng tr_TR
dc.relation.isversionof 10.47480/isibted.1203793 tr_TR
dc.rights info:eu-repo/semantics/openAccess tr_TR
dc.subject Heat Transfer Enhancement tr_TR
dc.subject Nanofluid tr_TR
dc.subject Capsule Dimples tr_TR
dc.subject Computational Analysis tr_TR
dc.title Analysıs Of Heat Transfer Enhancement In Tubes Wıth Capsule Dımpled Surfaces And Al2o3-Water Nanofluıd tr_TR
dc.type article tr_TR
dc.relation.journal Isı Bilimi ve Tekniği Dergisi tr_TR
dc.contributor.authorID 31329 tr_TR
dc.identifier.volume 42 tr_TR
dc.identifier.issue 2 tr_TR
dc.identifier.startpage 269 tr_TR
dc.identifier.endpage 280 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü tr_TR


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