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Liquid-gas phase behaviour of an argon-like fluid modelled by the hard-core two-Yukawa potential | | D.Pini
; G. Stell
; N.B. Wilding
; | | Date: |
13 Mar 2001 | | Journal: | J. Chem. Phys. 115, 2702 (2001) | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We study a model for an argon-like fluid parameterised in terms of a hard-core repulsion and a two-Yukawa potential. The liquid-gas phase behaviour of the model is obtained from the thermodynamically self-consistent Ornstein-Zernike approximation (SCOZA) of Hoye and Stell, the solution of which lends itself particularly well to a pair potential of this form. The predictions for the critical point and the coexistence curve are compared to new high resolution simulation data and to other liquid-state theories, including the hierarchical reference theory (HRT) of Parola and Reatto. Both SCOZA and HRT deliver results that are considerably more accurate than standard integral-equation approaches. Among the versions of SCOZA considered, the one yielding the best agreement with simulation successfully predicts the critical point parameters to within 1%. | | Source: | arXiv, cond-mat/0103276 | | Services: | Forum | Review | PDF | Favorites | |
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