Self-diffusion coefficients in dense fluids; the corrected Enskog theory

Abstract

An expression is given relating the exact self-diffusion coefficients for dense hard sphere systems, obtained by the method of molecular dynamics, to the molar volume. It is shown that this simple relationship gives an accurate description of the density dependence of the self-diffusion coefficients of dense gases and liquids and this provides further evidence that the molecular correlated motions observed in computer hard sphere studies occur in real fluids also.