A family of hard sphere fluids conformal to hard non-spherical molecules is examined using an angular-dependent potential parameter, σ(θ, ϕ), as an expansion parameter. It is shown that for moderate acentricities an optimum choice of hard sphere volumes exists which makes it possible to describe both pure nonspherical molecule fluids and their mixtures with high accuracy over a wide range of densities.
I. Nezbeda and T. W. Leland, J. Chem. Soc., Faraday Trans. 2, 1979, 75, 193 DOI: 10.1039/F29797500193
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