DNS analysis of a Re = 40 , 000 swirl burner
نویسندگان
چکیده
A premixed turbulent combustion Direct Numerical Simulation (DNS) database of a swirl burner is analyzed from three angles: estimation of the three-dimensional flame surface from two-dimensional fields; modeling of subgrid source and flux terms entering the balance equation for the reaction progress variable in Large Eddy Simulation (LES); and modeling of the subgrid-scale scalar variance in LES. The 2.6-billion-cell unstructured mesh DNS features a flow Reynolds number of 40,000 and a turbulent Reynolds number of 1,400. The new model proposed for the subgrid-scale scalar variance is also tested performing LES of the same swirl burner.
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