Transport properties in reacting mixture of polyatomic gases

The mathematical modeling of transport properties in reacting gases on the basis of kinetic equations for the distribution functions is given in this paper. Thermal and chemical nonequilibrium conditions are considered. The influence of rotational and vibrational excitation and chemical reactions on the pressure tensor, heat flux and diffusion velocity is investigated. The generalization of the Chapman-Enskog method is used at the different levels of the strong nonequilibrium mixture description. Three nonequilibrium models are presented: the level approach, the generalized multi-temperature approach and the one-temperature approach. The macroscopic equations for macroparameters are derived from the kinetic theory treatment, and the expressions for the pressure tensor, diffusion velocity and heat flux as well as for the transport coefficients are given. The role of the different rates of the various energy exchanges, the anharmonism of molecular vibrations and chemical reactions in the transport properties of reacting mixtures is discussed.