Integration of on‐the‐fly kinetic reduction with multidimensional CFD

A reduction approach for coupling complex kinetics with engine computational fluid dynamics (CFD) code has been developed. An on‐the‐fly reduction scheme was used to reduce the reaction mechanism dynamically during the reactive flow calculation in order to couple comprehensive chemistry with flow simulations in each computational cell. KIVA‐3V code is used as the CFD framework and CHEMKIN is employed to formulate chemistry, hydrodynamics and transport. Mechanism reduction was achieved by applying element flux analysis on‐the‐fly in the context of the multidimensional CFD calculation. The results show that incorporating the on‐the‐fly reduction approach in CFD code enables the simulation of ignition and combustion process accurately compared with detailed simulations. Both species and time‐dependant information can be provided by the current model with significantly reduced CPU time.