Note: Gas-liquid crossover in the Lennard-Jones system

Abstract

It is demonstrated that the crossover between gas- and liquid-like regions on the phase diagram of the Lennard-Jones system occurs at a fixed value of the density divided by its value at the freezing point, $\rho /{\rho }_{\mathrm{fr}}\simeq 0.35$. This definition is consistent with other definitions proposed recently. As a result a very simple practical expression for the gas-to-liquid crossover line emerges.

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• Elementary vibrational model for thermal conductivity of Lennard-Jones fluids: Applicability domain and accuracy level
• Freezing density scaling of transport coefficients in the Weeks-Chandler-Andersen fluid
• Generalized Rosenfeld-Tarazona scaling and high-density specific heat of simple liquids
• Excess entropy scaling of the transverse sound speed in simple fluids