Linear Eddy Modelling of the Sub-grid Scalar Mixing

Three different approaches for obtaining the subgrid variance and the scalar dissipation rate are compared with the more sophisticated subgrid linear eddy model (S-LEM). The steady-state laminar flamelet approach is used to obtain the chemical composition as a function of mixture fraction, its subgrid variance and dissipation rate. Results are compared with available experimental data for the Sandia flame D. The analysis shows that S-LEM model exhibits a great potential to further study the subgrid scalar mixing in a LES simulation