Summary
The rigorous binary viscosity expression ηmix as transformed to the form originally suggested by Sutherland is studied for mixtures involving polar gases. Any attempt to simplify the ϕ ij of the Sutherland viscosity expression turns out to be only approximately successful. A relation for ϕ ij /ϕ ji is however derived, and the procedure suggested for computing ηmix on this basis appears to be very successful. The ϕ ij to a large extent are temperature and composition independent and it has been shown that this fact can be utilised with success for predicting ηmix values at high temperatures.
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Mathur, S., Saxena, S.C. Viscosity of multicomponent gas mixtures of polar gases. Appl. sci. Res. 15, 203–215 (1966). https://doi.org/10.1007/BF00411556
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DOI: https://doi.org/10.1007/BF00411556