The configurational entropy of a binary mixture of unequal hard spheres is analysed over a wide range of densities and concentrations as a sum of two contributions: a pair term, s_2, arising from two-body spatial correlations, and a residual term, Delta_s, that is due to correlations involving more than two particles. The validity of a one-phase ordering criterion, based on the non-monotonic behaviour of Delta_s as a function of the total packing fraction, is investigated in relation to the phase transformations undergone by the model.
ON ENTROPY AND ORDERING IN BINARY HARD-SPHERE MIXTURES
GIAQUINTA, Paolo Vittorio;PRESTIPINO GIARRITTA, Santi
1994-01-01
Abstract
The configurational entropy of a binary mixture of unequal hard spheres is analysed over a wide range of densities and concentrations as a sum of two contributions: a pair term, s_2, arising from two-body spatial correlations, and a residual term, Delta_s, that is due to correlations involving more than two particles. The validity of a one-phase ordering criterion, based on the non-monotonic behaviour of Delta_s as a function of the total packing fraction, is investigated in relation to the phase transformations undergone by the model.File in questo prodotto:
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