The Nature of Asymmetry in Fluid Criticality

Abstract

By combining accurate liquid-vapor coexistence and heat-capacity data, we have unambiguously separated two non-analytical contributions of liquid-gas asymmetry in fluid criticality and proved the validity of "complete scaling" [Fisher et al., Phys. Rev. Lett. 85, 696 (2000); Phys. Rev. E, 67, 061506, (2003)]. We have also developed a method to obtain two scaling-field coefficients, responsible for the two sources of the asymmetry, from mean-field equations of state. Since the asymmetry effects are completely determined by Ising critical exponents, there is no need for a special renormalization-group theoretical treatment of asymmetric fluid criticality.

arXiv comment4 pages, 3 figures

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• Interfacial Properties of Fluids Exhibiting Liquid Polyamorphism and Water-Like Anomalies
• New version of the fluctuation Hamiltonian for liquids near the critical point
• Supercritical-subcritical correspondence, asymmetric effects and antisymmetric corrections near a critical point
• The impact of pressure on the critical miscibility of nitro compounds and n-alkanes mixtures