Key points are not available for this paper at this time.
Through a thermodynamic perturbation expansion, a new sphericalization procedure has been obtained for anisotropic molecular potentials. For N₂ the resulting fluid pressures and internal energies for the effective spherical potential differ at high densities by at most 1. 5% from exact molecular-dynamics calculations for the anisotropic N₂ potential. Results at lower densities are comparably good. Preliminary results for CO₂, an even more anisotropic molecule, are also excellent.
Shaw et al. (1983) studied this question.