On the theory of interaction between chemical reaction and viscous flow in dilute gases

The Boltzmann equation modified for the case of the chemical reaction: A+A=B+C is solved by the Chapman–Enskog perturbation method up to the third order (Burnett) approximation. This approximation is applied to the calculation of the contribution of the chemical reaction to the viscosity coefficient. Numerical calculations are performed with the use of the model of chemically reacting hard spheres. It is pointed out that this contribution can be quite important for values of the mean kinetic energy of the system, as indicated by kBT, close to the activation energy of the chemical reaction.