Use of binary diffusion and second virial coefficients to predict viscosities of gaseous systems

Abstract

Accurate binary diffusion coefficients measured over the temperature range 275-323 K, together with some excellent virial coefficients in the literature, have been used to derive (m,6,8) potential parameters for the systems He-CH₄, He-CF₄, He-O₂, Ar-O₂, CH₄-C₂H₆, CH₄-C₃H₈ and CH₄-C₄H₁₀. These parameters predict quite well the viscosities reported for these systems by Kestin and coworkers. The results indicate that binary diffusion coefficients can be used to predict viscosities more accurately than binary viscosities can be used to predict diffusion coefficients.