The viscosity of oxygen and of some of its mixtures with other gases

Abstract The paper reports new measurements of the viscosity of oxygen and air, and of the binary mixtures O2-Ar, O2-Kr and N2-O2, together with check values for the pure gases which appear in them. The measurements were performed in an oscillating-disk viscometer at atmospheric pressure and extrapolated to zero density. The nominal temperature range is 25–600°C, and the precision deteriorates from ±0.1% at 25°C to ±0.3% at 600°C. The experimental results are interpreted in terms of the Chapman-Enskog theory and the law of corresponding states due to Kestin, Ro and Wakeham. All tests show that the synthesis thus provided “predicts” the measured values with an uncertainty which does not exceed ±0.5% in most cases. The data yield new values of the binary diffusion coefficients of the mixtures, but do not permit us to calculate the thermal conductivity. Nevertheless, the analysis makes it plausible that Keyes's correlation for the thermal conductivity of oxygen might be acceptable.

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