Viscosity prediction for R32 and R143a at moderate density regimes via semi-empirically based assessment

Abstract

An efficient procedure for calculating transport properties, especially viscosity, at zero density is presented. The extended corresponding states approach of Huber et al. [Huber M L, Laesecke A & Perkins R A, Ind Eng Chem Res, 42 (2003) 3163] has been used for evaluating the viscosity coefficients for gaseous state of R32 and R143a in moderate-density regime. The Lennard-Jones 12-6 (LJ 12-6) potential energy function has been used as the initial model potential required by the technique. The interaction potential energies from the inversion procedure reproduce the viscosity within the uncertainty of the best measurements.