Hydrodynamic anomalies in supercritical fluid

Abstract

Using the molecular dynamics simulations we investigate properties of velocity autocorrelation function of Lennard-Jones fluid at long and intermediate time scales in wide ranges of temperature and density. We show that the amplitudes of the leading and subleading VAF time asymptotes, $a_1$ and $a_2$, show essentially non monotonous temperature and density dependence. There are two lines on temperature-density plain corresponding to maxima of $a_1$ ($a_2$) along isochors and isotherms situated in the supercritical fluid (hydrodynamic anomalies). These lines give insight into the stages of the fluid evolution into gas.

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Cited by in corpus (4)

• Self-assembly of the decagonal quasicrystalline order in simple three-dimensional systems
• Density of states and dynamical crossover in a dense fluid revealed by exponential mode analysis of the velocity autocorrelation function
• Molecular velocity auto-correlation of simple liquids observed by NMR MGSE method
• A simple closure procedure for the study of velocity autocorrelation functions in fluids as a "bridge" between different theoretical approaches