Velocity-pressure gradient correlation in reactive turbulent flows

A three-dimensional model of the correlation between velocity and pressure gradient which is of interest in stress equation modeling of turbulent flows is developed and tested. In particular, the correlation is developed with reference to variable density reacting flows, for which prior models, based on constant density turbulence, have some shortcomings. The model is tested against data on H2-air diffusion flames, using a form of the developed correlation appropriate for k epsilon modeling of the flame. It is found that inclusion of the correlation is imperative for satisfactory predictions of some of the flame features, and that the current model is satisfactory for such predictions.