Abstract
The accuracy of the structural data obtained from the recently proposed generalization tonon-additive hard-spheres (Schmidt 2004 J. Phys.: Condens. Matter 16 L351) ofRosenfeld’s functional is investigated. The radial distribution functions computed from thedirect correlation functions generated by the functional, through the Ornstein–Zernikeequations, are compared with those obtained from the density profile equations in thetest-particle limit, without and with test-particle consistency. The differences between theseroutes and the role of the optimization of the parameters of the reference system when thefunctional is used to obtain the reference bridge functional are discussed in the case ofsymmetric binary mixtures of non-additive hard-spheres. The case of highly asymmetricmixtures is finally briefly discussed.
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