Generalized van der Waals theory of liquid-liquid phase transitions
Yu. D. Fomin, V. N. Ryzhov, E. E. Tareyeva
Abstract
In the framework of the thermodynamic perturbation theory for fluids we study how the phase diagram of an isotropic repulsive soft-core attractive potential, where a liquid-liquid phase transition exists in addition to the standard gas-liquid phase transition, changes by varying the parameters of the potential. We show that existence of the liquid-liquid transition is determined by the interplay of the parameters of the potential and the structure of a reference liquid.
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