Enskog Theory and the Relationship between the Transport Coefficients of Fluids

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Abstract
A direct test of the dense fluid of hard spheres transport theory of Enskog is proposed utilizing certain ratios of the coefficients of self-diffusion, shear viscosity, and thermal conductivity. Application of the simple test to computer generated molecular dynamics of hard spheres transport data and available experimental data on dense fluids composed of roughly spherical molecules show that: (1) Enskog theory describes both the molecular dynamics data and the experimental data up to densities V0/V=0.5 and (2) departs from both significantly above that density value, while (3) molecular dynamics on hard spheres transport data with temperature dependent diameter appears to account adequately for the available experimental data.

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