Abstract
Abstract Shen, S. and Lu, B.C.-Y., 1993. Extension of the SWLE equation of state to property calculations for soft-core fluids. Fluid Phase Equilibria 86: 27-46 The previously developed four-parameter perturbed hard-sphere equation of state based on the square-well-linear-extension (SWLE) potential is extended to the property calculations for soft-core fluids. The predicted values of configurational Helmholtz free energy, configurational internal energy, compressibility factor and second virial coefficient for the Lennard-Jones fluid over a wide range of reduced density (ϱ ★ = 0.02–2.50) and reduced temperature ( T ★ = 0.591–100) are in good agreement with the computer simulation data. The predicted values of configurational internal energy (ϱ ★ =0.1–1.25, T ★ = 0.81169–811.69) and compressibility factor (ϱ ★ = 0.6–0.7, T ★ = 0.81169–811.69) for the modified Buckingham (6-exp) fluid are also satisfactory. For data correlation, the SWLE equation yields comparable accuracy with the 33-parameter equation of Adachi et al. (1988), [Adachi Y., Fijhara, T., Takamiya, M. and Nakanishi, K., 1988. Generalized equations of state for Lennard-Jones Fluids. I. Pure fluids and simple mixture. Fluid Phase Equilibria, 39: 1-38], based on the investigated thermodynamic properties of the Lennard-Jones fluid.
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