CFD modeling of natural convection in pebble bed geometry with finite volume method

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dc.authoridCATALBAS, Salih Said/0000-0002-7397-2658
dc.contributor.authorCatalbas, Salih Said
dc.contributor.authorTiftikci, Ali
dc.date.accessioned2025-03-23T19:30:15Z
dc.date.available2025-03-23T19:30:15Z
dc.date.issued2023
dc.departmentSinop Üniversitesi
dc.description.abstractIn this study, we used the finite volume method to computationally model natural convective flow in packed bed geometry. Using the OpenFOAM (R) v2112 code, we performed the computational analysis. We successfully meshed the intricate packed bed flow geometry, which consists of several spheres positioned at random. The spheres have sizes of 0.006 and 0.01 m, and the associated Rayleigh numbers are 1.83 x 10(7) and 8.48 x 10(7) respectively. We used the packed bed heights of H/d = 5, 10, and 20 in the simulations. By comparing the results of the OpenFOAM (R) v2112 simulations of the natural convection flow for all self-heating sphere in a packed bed, we demonstrated that the velocity distributions and Nusselt values are in good agreement with the experimental data. Additionally, it was evident from the velocity and temperature distributions in a packed bed core that there was a major temperature rise at nearby low velocity fields and a minor velocity rise in the intermediate and upper elevations. We showed that increasing the height of the pebble-bed core and correspondingly increasing the quantity of spheres inside it makes the flow more difficult and also generates local hot spots. This study is notable for using the finite volume method to evaluate natural convection flow in all self-heating packed beds and for simulating packed bed flow using a significant number of spheres. These two factors contribute to the originality of this work.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) ARDEB 2523 grant [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.doi10.1515/kern-2023-0039
dc.identifier.endpage631
dc.identifier.issn0932-3902
dc.identifier.issn2195-8580
dc.identifier.issue6
dc.identifier.scopus2-s2.0-85173876204
dc.identifier.scopusqualityQ3
dc.identifier.startpage617
dc.identifier.urihttps://doi.org/10.1515/kern-2023-0039
dc.identifier.urihttps://hdl.handle.net/11486/5055
dc.identifier.volume88
dc.identifier.wosWOS:001081593700001
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWalter De Gruyter Gmbh
dc.relation.ispartofKerntechnik
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectfinite volume method
dc.subjectnatural convection
dc.subjectpacked bed
dc.subjectheat transfer
dc.subjectsphere diameter
dc.subjectbed height
dc.titleCFD modeling of natural convection in pebble bed geometry with finite volume method
dc.typeArticle

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