Overview to Perturbation Theories for More Complex Systems 361
actual mixture can be obtained from those of the effective fluid. These questions
were analyzed by Malherbe and Amokrane (2001) for mixtures with R =5, 10, and
20 from simulations performed for the true mixture and for the effective fluid, with
a potential of the form (10.59) determined from computer simulation and assuming
pairwise additivity. The results showed that the effective one-component approxima-
tion overestimates the contact values g
11
(σ
11
) of the RDF, with a relative deviation
nearly independent of the partial packing fraction η
1
=(π/6)ρ
1
σ
3
1
of the solute but
increasing with the partial packing fraction η
2
of the solvent and with the diameter
ratio R. To further test the reliability ...