Liquid-gas phase behavior of Stockmayer fluid with high dipolar moment

Abstract

A multi-density version of the thermodynamic perturbation theory for associative fluids with central force associative potential is developed. The theory is used to describe the liquid-gas phase behavior of Stochmayer fluid with different values of the dipole moment ranging from low to high. Results of the theory are in a reasonable agreement with corresponding computer simulation results in a whole range of the dipole moment values studied. Contrary to previous computer simulation findings our calculations predict the occurence of the liquid-gas phase coexistence for the soft-sphere dipole fluid model.

Keywords

• Stockmayer fluid
• phase diagram
• association
• dipole moment