SIMULATION OF TURBULENT REACTIVE FLOW BY THE LARGE EDDY SIMULATION METHOD COMBINED WITH THE MONTE-CARLO METHOD FOR CALCULATING SUBGRID STRESSES
The algorithm and computational program are developed for modeling compressible turbulent reactive flows by the LES/VSFMDF (Large Eddy Simulation coupled with the Velocity-Scalar Filtered Mass Density Function) method. Subgrid turbulent stresses and subgrid turbulent mass and energy fluxes are modeled by interacting particles representing local instantaneous thermochemical states of the flow. The computational program was used to solve three problems: ( i ) the problem of the evolving isothermal mixing layer; ( ii ) the problem of the mixing layer with chemical reactions; and ( iii ) the problem of the airflow around the square cylinder. Results were compared with the Direct Numerical Simulation and with the simulation by LES/SSM (LES coupled with the Smagorinsky model for the subgrid turbulent stresses) method. In the problem of the airflow around the square cylinder at Reynolds number of 22 000, the results of numerical calculations are compared with the experimental data for the fields of mean and pulsating velocity and for the drag coefficient.