A novel buoyancy-modified subgrid-scale model for large-eddy simulation of turbulent convection

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dc.contributor.authorYilmaz, Ilyas
dc.date.accessioned2024-07-18T20:47:14Z
dc.date.available2024-07-18T20:47:14Z
dc.date.issued2021
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractPurpose - The purpose of this paper is to develop a subgrid-scale (SGS) model for large eddy simulation (LES) of buoyancy- and thermally driven transitional and turbulent flows and further examine its performance. Design/methodology/approach - Favre-filtered, non-dimensional LES equations are solved using non-dissipative, fully implicit, kinetic energy conserving, finite-volume algorithm which uses an iterative predictor-corrector approach based on pressure correction. Also, to develop a new SGS model which accounts for buoyancy, turbulent generation term in SGS viscosity is properly modified and enhanced by buoyancy production. Findings - The proposed model has been successfully applied to turbulent Rayleigh-Benard convection. The results show that the model is able to reproduce the complex physics of turbulent thermal convection. In comparison with the original wall-adapting local eddy-viscosity (WALE) and buoyancy-modified (BM) Smagorinsky models, turbulent diagnostics predicted by the new model are in better agreement with direct numerical simulation. Originality/value - A BM variant of the WALE SGS model is newly developed and analyzed.en_US
dc.identifier.doi10.1108/HFF-11-2020-0754
dc.identifier.endpage2533en_US
dc.identifier.issn0961-5539
dc.identifier.issn1758-6585
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85109265368en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage2509en_US
dc.identifier.urihttps://doi.org/10.1108/HFF-11-2020-0754
dc.identifier.urihttps://hdl.handle.net/11411/7735
dc.identifier.volume31en_US
dc.identifier.wosWOS:000670004700001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherEmerald Group Publishing Ltden_US
dc.relation.ispartofInternational Journal of Numerical Methods for Heat & Fluid Flowen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLarge Eddy Simulationen_US
dc.subjectRayleigh-Benard Convectionen_US
dc.subjectBuoyancy-Modifieden_US
dc.subjectSubgrid-Scale Modelen_US
dc.subjectWall-Adapting Local Eddy-Viscosity Modelen_US
dc.subjectRayleigh-Benard Convectionen_US
dc.subjectNumerical-Simulationen_US
dc.subjectStressen_US
dc.subjectLesen_US
dc.subjectFlowen_US
dc.titleA novel buoyancy-modified subgrid-scale model for large-eddy simulation of turbulent convection
dc.typeArticle

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