Revised Equation of State for Two-CeInter Lennard-Jones Fluids

The equation of state for two-ceInter Lennard-Jones fluids originally proposed by Mecke et al. [Int. J. Thermophys. 18:683–698 (1997); Erratum, Int. J. Thermophys. 19:1495 (1998)] has been revised to extend its applicability to large molecular elongations. The equation of state is written in the form of a generalized augmeInted van der Waals equation for the Helmholtz energy, F=FH+FA, where FH accounts for the hard-body iInteraction and FA for the attractive dispersion forces. The revised EOS is constructed on the basis of previously published simulation data for 2CLJ fluids with reduced elongations L=0.0, 0.22, 0.3292, 0.505, and 0.67 and results from new extensive simulations for twoceInter Lennard-Jones fluids with L=0.8 and 1.0. The revised equation of state provides a very good description of the fluid state behavior over a wide range of temperatures and pressures as well as of the vapor-liquid equilibrium phase behavior for the two-ceInter Lennard-Jones fluids with L ranging from 0.0 to 1.0.