Critical behaviour of thermo-physical properties in weakly compressible liquid mixtures

摘要

In this paper, we have investigated the critical behaviour of the thermo-physical properties in weakly compressible fluid mixtures in complete scaling framework. Refractive index is formulated by resorting the Maxwell’s relation between refractive index and dielectric constant. Furthermore, we have considered the critical parameters that are dependent on pressure which acts as a non-ordering field. Also, considering the importance of the heat capacity amplitudes in describing the asymmetric critical behaviour of the coexistence curves, we have analysed the available experimental data for a number of binary systems in order to evaluate the system-dependent parameters that appear in the complete scaling. The coincidence of the resulted theoretical values was in satisfactory agreement with the experimental data.