Investigation of natural convection heat transfer of self-heating packed beds

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dc.authoridCATALBAS, Salih Said/0000-0002-7397-2658
dc.contributor.authorTiftikci, Ali
dc.contributor.authorCatalbas, Salih Said
dc.contributor.authorPolat, Eyyub
dc.contributor.authorAhn, Hyun-Ha
dc.contributor.authorHan, Jeong-Won
dc.contributor.authorChung, Bum- Jin
dc.date.accessioned2025-03-23T19:41:30Z
dc.date.available2025-03-23T19:41:30Z
dc.date.issued2023
dc.departmentSinop Üniversitesi
dc.description.abstractThis study investigated heat transfer characteristics of natural convective flow in the packed bed geometry experimentally and numerically. The natural convection experiments for self-heating condition were performed using the copper sulfate electroplating system based on the analogy between heat and mass transfers. Also, the same conditions were simulated with Lattice-Boltzmann Method (LBM) and the results were compared. The spheres diameters were d = 4, 6 and 10 mm and the corresponding Rayleigh numbers were 5.43 x 106, 1.83 x 107 and 8.48 x 107 respectively. The packed bed height to sphere diameter ratios, H/d were 5, 10 and 20. The Nusselt numbers (Nud), velocity and shear stress distributions of both analyses were in good agreement. Both results showed the same order (10-2 m/s) of irregular velocity distributions resulting from the random arrangement of the spheres. In spite of the laminar flow condition, wake and vortex generated by the packed bed geometry increased the turbulent kinetic energies to one-or two-order higher values than those at the entrance. The temperature profiles of flow inside packed bed were approximately uniform for d = 4 mm cases but there were temperature gradients in case of d = 10 mm. This revealed that the use of smaller fuel sphere can prevent from unwanted hot spots inside the packed bed. The Nud values from LBM results and newly developed empirical correlation for natural convective flow in packed bed were consistent.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [ARDEB 2523, 120N935]; Ministry of Science and ICT (MSIT); National Research Foundation (NRF) [2020K2A9A1A06097156]
dc.description.sponsorshipThis study was co -funded by the Scientific and Technological Research Council of Turkey (TUBITAK) ARDEB 2523 Grant No 120N935 and by the Ministry of Science and ICT (MSIT) with National Research Foundation (NRF) (Grant codes 2020K2A9A1A06097156) .
dc.identifier.doi10.1016/j.icheatmasstransfer.2023.106642
dc.identifier.issn0735-1933
dc.identifier.issn1879-0178
dc.identifier.scopus2-s2.0-85146731142
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.icheatmasstransfer.2023.106642
dc.identifier.urihttps://hdl.handle.net/11486/6596
dc.identifier.volume142
dc.identifier.wosWOS:000973042500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Communications in Heat and Mass Transfer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectNatural convection
dc.subjectPacked bed
dc.subjectAll heating sphere
dc.subjectHeat transfer
dc.subjectLattice-Boltzmann
dc.subjectAnalogy
dc.titleInvestigation of natural convection heat transfer of self-heating packed beds
dc.typeArticle

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