Abstract
This paper presents expressions for the evaluation of the second-and third-order Chapman-Cowling approximation to the thermal conductivity of a multicomponent monatomic gas mixture in the limit of zero density. Calculation of these higher-order corrections have been carried out for some monatomic gas mixtures. The higher-order corrections contribute as much as 3% to the thermal conductivity of binary mixtures of gases with a large mass ratio. It is found that the higher-order kinetic theory formulae provide an adequate description of recent thermal conductivity data that have an associated uncertainty of ±0.2%. The results of this analysis are employed to demonstrate that these thermal conductivity data are entirely consistent with earlier viscosity data on the same systems.
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Assael, M.J., Wakeham, W.A. & Kestin, J. Higher-order approximation to the thermal conductivity of monatomic gas mixtures. Int J Thermophys 1, 7–32 (1980). https://doi.org/10.1007/BF00506269
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DOI: https://doi.org/10.1007/BF00506269