Effect of Damkohler number on the reaction zone. in a reacting shear layer

Numerical simulation is used to study the behavior of an unstable, two-dimensional, two-stream, spatially developing reacting shear layer. The physical model is based on a low heat release chemical reaction and is used to investigate the effects of the flow field on the chemical reaction at high Reynolds and Peclet numbers and moderate Damkohler numbers. The unsteady mass, momentum, energy and species conservation equations are integrated using a grid-free, Lagrangian field method in which the gradients of the primary variables are transported along particle trajectories to preserve the numerical accuracy as strong strains arise in the flow. Results reveal a strong similarity between the distribution of product concentration and vorticity at a wide range of Damkohler number