Collision Integrals for Ion-Neutral Interactions of Nitrogen and Oxygen

Diffusion and viscosity collision integrals are computed for all ion‐neutral binary interactions that occur in high-temperature partially ionized air, using a Tang‐Toennies interaction potential. Resonant charge transfer effects are included as appropriate. Results are compared to more accurate computations where available. The computed collision integrals are estimated to be accurate to within ±25% ove ra temperature range from room temperature to 12,000 K. The data are presented in tabular form, making them immediately useful for engineering computations such as computational-fluid-dynamics simulations of reentry vehicles.