Approximate Calculation of Transport Coefficients ofEarth and Mars Atmospheric Dissociating Gases

High-temperature transport properties (viscosity, thermal conductivity, binary and multicomponent mass diffusion, and thermal diffusion) of dissociating gases of the Earth and Martian atmospheres have been calculated within the framework of the Chapman-Enskog method. The exponential repulsion potentials of interactions between atoms (N, 0 , and C) and molecules (N,, 0,, NO, C,, CN, CO, and CO,) were studied. The collision cross sections were calculated from numerous experimental molecular-beam scattering data. The bifurcation approximation to the binary diffusion coefficients and the Wilke-Saxena approximate techniques were effectively used to simplify numerical algorithms of heat transfer calculations.