Abstract
The objective of this paper is to gain insight into the process of chemical reaction in turbulent mixing layers. To achieve this purpose, we have performed direct numerical simulations of three-dimensional chemically reacting mixing layers using a spectral method. The results are reported for the case of velocity fields with initial periodic excitation. From these results, we have reached the following conclusions : 1) on the streamwise vortical structures (ribs) in the braid region, the peak of the chemical production term exists ; and 2) the core region contributes significantly to the total production in the mixing layer, whereas local production rate is not so high.
