Transport Properties of Gases with a Square-Well Molecular Interaction Potential

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Abstract
The kinetic theory cross‐section integrals are calculated for the square‐well molecular potential model. Parameters are determined for light gases from viscosity measurements and are used to reproduce viscosity data for pure gases and binary mixtures. Comparison is made between these parameters and those found from compressibility data and other transport properties. Different sets of parameters are apparently required for each transport property in order to account for the experimental results. The thermal diffusion constant for this model is a function of temperature and one other parameter. Excellent reproduction of the neon isotope data is obtained, and predictions of the qualitative behavior of the thermal diffusion ratio are made.