A novel model for incorporation of differential diffusion effects in PDF simulations of non-premixed turbulent flames based on reaction-diffusion manifolds (REDIM)

In this work, reaction-diffusion manifold (REDIM) reduced chemistry is used in the simulation of turbulent non-premixed flames based on a transported-probability density function model. Differential molecular diffusion applied generation manifolds. This first work to consider gradients variables as additional parameters REDIM model, and one-directional are utilized generate chemistry. Hereby, influence turbulence differential automatically considered terms variable gradients, physical transport properties (e.g., coefficients) detailed way, without any modeling unity-Lewis number assumption). Although scalar appear multi-directional general reacting flow, previous direct numerical analysis reveals that REDIMs generated from can accurately describe system featuring if gradient has major effect Here, it proposed obtain such under hypothesis flame structure locally one-dimensional at each spatial position. order retrieve for interpolation thermo-kinetic states table, sub-grid evaluated here particle fields. The well-known Sandia series selected validate algorithm. results show new algorithm reproduce quantities with high accuracy all investigated flames.