Structural behavior of fluids from the vapor and liquid region to the supercritical phase.

摘要: A metric (χ) is introduced to quantify the relative proportion of particles having a specified number near neighbors that are characteristic liquid-phase properties. It can be used as simple alternative other methods for investigation some aspects percolation behavior. Values χ obtained from molecular-dynamics simulations spanning heterogeneous vapor and liquid region supercritical phase Lennard-Jones fluid. The delineated into regions different structural At isochoric subcritical conditions, temperature versus behavior shows evidence inflections, which associated with onset transitions phase. analysis suggests phenomenological requirement critical point in terms near-equal gaslike liquidlike characteristics.