Specific properties of argon-like liquids near their spinodals

Abstract

The work is devoted to the computer simulation study of the spinodal position for argon and low-molecular liquids having the averaged interparticle potentials similar to that for argon. For this purpose several new methods are developed: the study of the intersection points for pressure curves on pairs of two close isochors, specific changes for the isochoric behavior of the radial correlation functions near the spinodal, non-trivial changes of the temperature dependencies for isochoric values of the self-diffusion coefficient, kinematic shear viscosity and Maxwell relaxation time of argon at the intersection of its spinodal. The three last characteristics are determined with the help of analysis of long time tails for the velocity auto-correlation function. Obtained in such a way the position of spinodal is compared with that following from the experimental study and computer simulations of the isothermal compressibility.