鈍頭平板周りのはく離・再付着乱流のLarge Eddy Simulation

抄録

Numerical simulation of the turbulent separated and reattached flow over a blunt flat plate has been carried out using the large eddy simulation (LES) technique. The dynamic Smagorinsky model (DSM) is used for modeling the subgrid-scale (SGS) stress and the Smagorinsky constant is calculated as a function of space and time. Three Reynolds numbers, 50 000, 11 600, and 1 000, are selected for calculations. The results for the former two cases are compared with experimental data and that for the latter with direct numerical simulation (DNS) data. The present results show good agreement with those data, and it is found that LES using DSM is applicable to engineering prediction for the complex flow accompanying separation and reattachment over a wide range of Reynolds number.