Yilmaz, Ilyas2024-07-182024-07-1820210961-55391758-6585https://doi.org/10.1108/HFF-11-2020-0754https://hdl.handle.net/11411/7735Purpose - 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.eninfo:eu-repo/semantics/closedAccessLarge Eddy SimulationRayleigh-Benard ConvectionBuoyancy-ModifiedSubgrid-Scale ModelWall-Adapting Local Eddy-Viscosity ModelRayleigh-Benard ConvectionNumerical-SimulationStressLesFlowArticle2-s2.0-8510926536810.1108/HFF-11-2020-075425338Q1250931Q1WOS:000670004700001