Statistical Analysis of Chemically Reacting Passive Scalars in Turbulent Shear Flows

抄録

Diffusion and reaction of chemically reacting passive scalars in turbulent shear flows are investigated. A binary irreversible reaction with no heat release is considered. The binary and triple correlations such as the scalar fIux, the scalar variance, and the squared-scalar flux are calculated by applying a two-scale direct-interaction formalism. The results are simplified by the use of the inertial-range theory to construct two models for the passive scalars: an ensemble-averaged model of k-ε type, and a LES model.