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- W2912653775 abstract "Turbulent mixed convection characteristics inside a rectangular cavity are studied experimentally and numerically. Hot wire anemometry (HWA), particle image velocimetry (PIV) and thermocouples were used to study the velocity and temperature field for Re = 8.3 × 103 and Ra = 4.34 × 1012. The Large Eddy Simulation (LES) was carried out using the dynamic Smagorinsky model and the Favre-averaging method for 1.08 × 1012 ≤ Ra ≤ 6.50 × 1012 to further investigate the effect of the buoyancy. The time-averaged field demonstrates the circulation flow structure and thermal stratification in the cavity. The heat transfer on the heated side wall shows a significant deviation from natural convection due to the center jet flow. The turbulent flow development and coherent structures induced by buoyancy and shear force are presented with the second invariant of the velocity gradient tensor. The turbulence quantities such as velocity and temperature fluctuation, and turbulent heat flux are found highly concentrated near the heated side walls and the center jet boundary, and increase significantly with buoyancy. By comparing the experimental results, the accuracy of the LES for mixed convection is also determined." @default.
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- W2912653775 date "2019-03-01" @default.
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- W2912653775 title "Large eddy simulation and experimental study of turbulent mixed convection inside a cavity with large Rayleigh number: Effect of buoyancy" @default.
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- W2912653775 doi "https://doi.org/10.1016/j.buildenv.2019.01.041" @default.
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