Collision integrals and high temperature transport properties for NN, OO, and NO
Abstract
Accurate collision integrals for the interactions of N(4S0) + N(4S0), O(3P) + O(3P), and N(4S0) + O(3P) are reported. These are computed from a semiclassical formulation of the scattering using the best available representations of all of the potential energy curves needed to describe the collisions. Spectroscopic curves and other accurate measured data are used where available; the results of accurate ab initio electronic structure calculations are used to determine the remaining potential curves. The highlying states are found to give the largest contributions to the collision cross sections. The nine collision integrals needed to determine transport properties to second order are tabulated for translational temperatures in the range 250100,000 K. The viscosity, thermal conductivity, diffusion coefficient, and thermal diffusion factor for a gas composed of nitrogen and oxygen atoms in thermal equilibrium have been calculated. It is found that the secondorder contribution to the transport properties is small. Graphs of these transport properties for various mixture ratios are presented for temperatures in the range 500015,000 K.
 Publication:

Journal of Thermophysics and Heat Transfer
 Pub Date:
 October 1990
 Bibcode:
 1990JTHT....4..469L
 Keywords:

 Atomic Collisions;
 Atomic Interactions;
 High Temperature Environments;
 Potential Energy;
 Transport Properties;
 Atomic Energy Levels;
 Integral Equations;
 Nitric Oxide;
 Nitrogen;
 Oxygen;
 Thermal Conductivity;
 Thermal Diffusion;
 Viscosity;
 Thermodynamics and Statistical Physics