Extended many-body potential of Hauschild and Prausnitz for pure HFD-like fluids

We have extended the many-body potential of Hauschild and Prausnitz (1993) in terms of the non-additivity coefficient and density (at different temperatures from liquid phase to supercritical region) for pure fluids. In order to compare our many-body potential with the accurate three-body potentials in the literature, we have performed molecular dynamics simulation to obtain pressure and self-diffusion coefficient values at different temperatures and densities using the two-body HFD-like potential and different three-body potentials. Our results indicated that our extended many-body potential is superior to the three-body potential of Guzman et al. (2011) for the different fluids and is also better than the three-body potential of Wang and Sadus (2006) for some noble gases.