Corresponding States Correlation for Transport Properties of Simple Fluids

Abstract

The principle of corresponding states was discussed for self-diffusion coeffi cient and viscosity of simple fluids. The core-repulsion part in the intermolecular potential plays a key role in the transport properties of pure simple fluids. Corre sponding states correlation for these properties can be obtained by using the scaled density alone, except for two domains; the liquid states at high pressures and low temperature, and the dilute gas states at low temperatures. For simple molecules, one parameter of each substance needed for the correlation is related to the molecular volume and the temperature at its freezing point.