| Abstract: | A disturbance of a quasiequilibrium distribution due either to a relaxation process or hydrodynamic perturbations can significantly influence the rate of the relaxation process in a gas. The expression for this rate then contains additional terms proportional to the spatial derivatives of the hydrodynamic variables 1–2]. According to the estimates of 2], the effect is clearly manifested in a nonequilibrium dissociating gas. The present authors have estimated 3] some of the additional terms in the initial stage of dissociation in a pure diatomic gas. In the present paper, expressions are obtained for the coefficients of the additional terms of the hydrodynamic equations in a dissociating diatomic gas for all dissociation laws. Estimates made for the example of oxygen show that the contribution of the additional terms to the hydrodynamic equations is comparable with the contribution of the ordinary Navier-Stokes terms. |
