Self-Diffusion Coefficient And Viscosity Of Supercritical Fluids.

ZABALOY M.S; VASQUEZ V.R; MACEDO E.A

Trieste, Italy

Congreso; 7th Italian Conference on Supercritical Fluids and Their Applications - 9th Meeting on Supercritical Fluids-13-16 June, 2004; 2004

University of Trieste

In this work, we propose a model for representing both the viscosity and the self diffusion coefficient (SDC) of supercritical pure fluids in wide ranges of conditions. A given pure real fluid is represented as a Lennard-Jones (LJ) fluid having efective values of the LJ intermolecular potential parameters. The model is able to represent the pure compound viscosity and self diffusion coefficient of real supercritical fluids, in wide ranges of conditions, with average absolute-value relative deviations less than or about 10 % for both properties. Key words: self diffusion coefficient, viscosity, supercritical real fluids, model, molecular simulation