Transport coefficients of simple fluids in a density range from the solid to the dilute gas

The density and temperature dependence of the shear viscosity, thermal conductivity, thermal diffusivity and self-diffusion coefficients of the rare gases and methane obtained from a great variety of precise data are studied in the entire fluid range. The transport coefficients of the rare gases obey the corresponding states principle. All transport coefficients at constant reduced density show a power law dependence on the reduced temperature, except in the critical region. Combining this behaviour with the smooth behaviour at constant reduced temperature as a function of the reduced density allows estimates to be made of the transport coefficients at thermodynamic states, for which no experimental data are available.