Theoretical model of the equation of state for ternary fluid mixtures with exp-6 potential

A new effective two-fluid model is presented. This model is based on the developed equation of state of binary mixtures. In this model division of all components of mixture into two groups with close well-depth parameters is supposed. Thus, the multicomponent mixture is presented in the form of effective two-component fluid. This technique precludes mistake made by effective one-fluid model in calculation of thermodynamic parameters of multicomponent mixture with considerably different well-depth parameters of components. Calculations of the ternary mixtures of various compositions are carried out. It is shown that the results of calculations obtained with the presented method are in better agreement with the experimental data as compared to the similar calculations based on the effective one-fluid model.