Transport Properties of Selected Elements and Compounds in the Gaseous State. Part 2.

Abstract

Abstract : This report presents calculated values of the viscosity, thermal conductivity, and Fickian diffusion coefficient for gases and gas mixtures of interest to laser technology. Tables of viscosity, thermal conductivity, and diffusion coefficient have been prepared for one hundred seven binary mixtures and for nine pure substances, the latter being helium, atomic and molecular hydrogen, atomic and molecular deuterium, atomic and molecular fluorine, hydrogen fluoride, and deuterium fluoride. Most of the binary mixtures are combinations of these substances. The temperature range was from 100 to 3000 K. For the pure substances, the most recent recommendations were used and for the mixtures, the Lennard-Jones 6-12 potential was used for viscosity and diffusion, and a linear mixing rule was employed for thermal conductivity. The precision of the tabulated values is reviewed. The present state-of-the-art in predicting these properties is briefly surveyed. It is concluded that significant discrepancies can still exist between theoretical and experimental quantities.