THE EQUATION FOR СORRELATION FUNCTION OF A SCALAR AND TURBULENT REACTION FLOWS
The model based on the equation for correlation function and the presumed probability density function (PDF) are used for the taking into account the interference of chemical reaction and micromixing in turbulent flows. The concrete PDF is calculated as the mean and the variance of the scalar calculated from the equations for mean scalar and its correlation function. The scalar is supposed passive, that do not cause changes of turbulence and diffusivity. The necessary parameters of a homogeneous turbulent field are assumed known and approximated by elementary dependences. The process of scalar transfer in a plain layer which boundary values of the scalar are given, is considered. The results of the influence of chemical transformations on the distributions of average and variance fields of a scalar and the distribution of the scalar dissipation are received. The calculation of the reaction zone formation is carried out.