EFFECT OF THE NANOFLUID FLOW AND EXTENDED SURFACES ON AN ABRUPT EXPANSION TUBE REGARDING THERMODYNAMIC IRREVERSIBILITY

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dc.contributor.authorPazarlioglu, H.K.
dc.contributor.authorEkiciler, R.
dc.date.accessioned2024-09-29T16:16:30Z
dc.date.available2024-09-29T16:16:30Z
dc.date.issued2024
dc.departmentKarabük Üniversitesien_US
dc.description.abstractNumerous scientists have examined circular dimpled surfaces, tubes, and other approaches for enhancing heat transfer. Moreover, the dimples’ angle of attack has a substantial effect on the tube’s flow and thermal features. This numerical study presents a novel approach to enhancing heat transfer rate in a tube subjected to constant heat flux by incorporating a surface dimpling strategy and evaluates three different tube layouts with elliptical dimpled fins for different working fluids such as DW and Al2O3/DW nanofluid (? = 0.5–1.0%) by using ANSYS Fluent v2020R2 under laminar flow conditions. Under identical circumstances, the thermal performances of proposed designs are compared to those of a smooth tube, and the influence of the elliptical dimpled fin angle of attack on these parameters is determined for different Reynolds numbers (1000 ? Re ? 2000). When comparing the Nusselt number of a tube with/without elliptical dimpled fins, it is found that EDT 1 performed better. Lower Reynolds numbers are shown to result in a greater friction factor. Besides, elliptical dimpled fins promote flow mixing within the tube and the establishment of a thermal boundary layer. At a 135° attack angle (EDT 1), the 1.0% Al2O3/DW nanofluid is found to be the best-performing nanofluid in the dimpled tube, improving Nu by up to 44.56%. Furthermore, ff presented an increase of 29.18% when comparing ST and EDT 1 flowing 1.0% Al2O3/DW at Re = 2000, while total S•gen is diminished by 37.75% in the same conditions. © 2024 by Begell House, Inc.en_US
dc.identifier.doi10.1615/HeatTransRes.2023048288
dc.identifier.endpage67en_US
dc.identifier.issn1064-2285
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85181769447en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage49en_US
dc.identifier.urihttps://doi.org/10.1615/HeatTransRes.2023048288
dc.identifier.urihttps://hdl.handle.net/20.500.14619/9136
dc.identifier.volume55en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherBegell House Inc.en_US
dc.relation.ispartofHeat Transfer Researchen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAl<sub>2</sub>O<sub>3</sub>/DWen_US
dc.subjectCFDen_US
dc.subjectelliptical dimpled finen_US
dc.subjectentropy generationen_US
dc.subjectnanofluiden_US
dc.subjectsudden expansion tubeen_US
dc.titleEFFECT OF THE NANOFLUID FLOW AND EXTENDED SURFACES ON AN ABRUPT EXPANSION TUBE REGARDING THERMODYNAMIC IRREVERSIBILITYen_US
dc.typeArticleen_US

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