Thermal conductivity of multicomponent polyatomic dilute gas mixtures

A new expression for the thermal conductivity of an N-component polyatomic gas mixture in the dilute-gas limit has been derived, based on the Thijsse approximation. The restdts are preseInted in terms of experimentally accessible quantities to allow for easier calculation of the thermal conductivity and easier iInterpretation of the experimentally available data. The resulting expressions are much simpler than other Ibrmulae hitherto available. An additional new expression Ibr the thermal conductivity of an N-component polyatomic gas mixture has been derived by replacing the effective cross-section by their spherical limits. These results are cast in a form which is analogous with, and no more complicated than, the corresponding expressions tbr purely monatomic mixtures