Abstract
Numerical simulation of turbulent heat transfer over a blunt flat plate accompanying the separation and reattachment has been carried out by using the large eddy simulation (LES) technique. The dynamic Smagorinsky model (DSM) is used for modeling the subgrid-sacle (SGS) heat flux, and the SGS turbulent Prandtl number is calculated as a function of space and time. Numerical calculations were made for three Reynolds numbers at Prandtl number 0.7 and are compared with previous experimental data and the direct numerical simulation (DNS) data. The present results using DSM show better agreement with experimental data than using Smagorinsky model (SM) and agree well with DNS data. It is shown that LES using DSM is applicable to the engineering prediction of the temperature field with the separated and reattached flow regions over a wide range of Reynolds number.
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