The transport coefficients for a fluid of square-well rough spheres: Comparison with methane

Abstract

Recently derived expressions for the transport coefficients of a dense fluid of square‐well rough spheres and corresponding expressions for smooth spheres have been evaluated with structural data generated in computer simulations. The results are used with recommended square‐well potential parameters to calculate the tranport properties of methane for both models. For the shear viscosity and thermal conductivity the rough‐sphere values have the better agreement with experiment, while for the self‐diffusion coefficient they have marginally the worse agreement. No experimental data exist with which to compare the calculated bulk viscosities, which are considerably higher for rough than for smooth spheres.