Measurements of the viscosity of compressed gaseous and liquid oxygen

The coefficient of shear viscosity of fluid oxygen has been determined at temperatures from 75 to 300 K at pressures up to 34 MPa with a torsionally oscillating quartz crystal. The estimated accuracy and precision of these measurements are 2% and 0.5%, respectively. Dilute gas viscosities and first-density coefficients were obtained from a statistical analysis of the gaseous isotherms at temperatures from 110 to 300 K using expansions in density. An empirical equation that represents the complete set of measurements as a function of density and temperature is presented. Comprehensive comparisons are made with previous experimental data and predicted values.