Abstract
ABSTRACT: A universally applicable model is presented for the calculation of the transport properties of ionized species in CFD simulations. A multicomponent mixture formulation and simple mixing rules are used to compute the transport coefficients of dissociated and ionized air from room temperature up to 30000 K at different pressures. Both formulations share little input data, which simplifies the handling of the transport model. The calculated binary diffusion coefficients are similar to the results of Levin et al.1–3 and Capitelli et al.4 The computed transport coefficients of the mixture are compared to the results of Gupta et al.5 A good agreement is found in the temperature range below 10000 K. At higher temperatures the results differ, because of the differences in the collision integrals of neutral-ion and Coulomb interactions and because of the use of higher approximations of transport properties of electrons in the present model.
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