Conceptual Limitations of the Probability Density Function Method for Modeling Turbulent Premixed Combustion and Closed-Form Description of Chemical Reactions’ Effects

In this paper, we critically analyzed possibilities of probability density function (PDF) methods for the closed-form description combustion chemical effects in turbulent premixed flames. We came to conclusion that concept a classical modeling strategy PDF method based on use reaction-independent mixing models is not applicable The reason strong dependence reactions due thin-reaction-zone nature confirmed recent optical studies and direct numerical simulations. case, effect caused by coupled reaction–diffusion processes take place thin zones instantaneous combustion. considered possible alternative strategies would allow be described closed form only hypothetical case where occurs reaction identical zone undisturbed laminar flame. For flamelet regime, an inverse model directly contains characteristics distributed preheat offer original joint direct/inverse strategy. thickened combine correspondingly simulation structure determination global