Heat transfer and flow characteristics in a sinusoidally curved converging-diverging channel

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dc.authoridSahin, Besir/0000-0003-0671-0890
dc.contributor.authorKurtulmus, Nazim
dc.contributor.authorZontul, Harun
dc.contributor.authorSahin, Besir
dc.date.accessioned2025-01-06T17:38:01Z
dc.date.available2025-01-06T17:38:01Z
dc.date.issued2020
dc.description.abstractThe objective of this work is to present the thermal performance characteristics and to examine the hydrodynamic structure of the fluid which improves the rate of heat transfer in parallel with the penalty of pressure drop by means of the time-averaged streamlines topology, , streamwise velocity distribution, , vorticity concentration, and turbulent Reynolds stress, (u'v') over bar /U-2 for the sinusoidal wavy channel. A wide range of experiments were performed for Reynolds numbers, Re ranging from 4 x 10(3) to 1 x 10(4) in order to determine the heat transfer rate and the friction factor, f with varying the channel height expansion/contraction ratio, M = H-min/H-max such as 0.5, 0.35 and 0.28. The results revealed that a significant heat transfer enhancement was achieved with a considerable penalty of pressure drop. The highest thermal performance factor, TPF was obtained as 1.46 for M = 0.5. Numerical simulations were conducted to confirm the experimental results for the same parameters. The Shear Stress Transport k-w (SST k-w) turbulence model was used to perform numerical analyses. After ensuring the consistency of experimental thermal performance results with numerical predictions, the Particle image velocimetry (PIV) system was utilized for investigating the flow physics in the sinusoidally curved converging-diverging channel for all M values at Re = 4 x 10(3) where the TPF is maximum.
dc.description.sponsorshipoffice of Scientific Research Projects of Cukurova University [FDK-2016-6339]
dc.description.sponsorshipThe authors wish to thank the office of Scientific Research Projects of Cukurova University for funding this project under Contract No. FDK-2016-6339.
dc.identifier.doi10.1016/j.ijthermalsci.2019.106163
dc.identifier.issn1290-0729
dc.identifier.issn1778-4166
dc.identifier.scopus2-s2.0-85075379608
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.ijthermalsci.2019.106163
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2422
dc.identifier.volume148
dc.identifier.wosWOS:000499697900019
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier France-Editions Scientifiques Medicales Elsevier
dc.relation.ispartofInternational Journal of Thermal Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectFlow characteristics
dc.subjectHeat transfer enhancement
dc.subjectPIV
dc.subjectWavy-wall channel
dc.titleHeat transfer and flow characteristics in a sinusoidally curved converging-diverging channel
dc.typeArticle

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