The Intramolecular Pressure and the Extension of the Critical Point’s Influence Zone on the Order Parameter

Figure 2

The top figure represents an instantaneous snapshot of the ethane molecules (flexible MIE potential) in the vapor-liquid equilibrium at 260 K. The -axis represents the inhomogeneous direction, while the -axis represents one of the two homogeneous directions. The bottom figure shows density profiles of ethane in the VLE as a function of the simulation cell position in the inhomogeneous direction of the simulation cell. The black line represents the profile at 100 K, while blue and red represent the profiles at 180 K and 260 K, respectively.