title: 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 both the leading and the subleading time asymptotic terms of velocity autocorrelation function, a1 and a2, show essentially non-monotonic temperature and density dependence. There are two lines on temperature-density plain corresponding to maxima of a1 (a2) along isochors and isotherms situated in the supercritical fluid (hydrodynamic anomalies). These lines give insight into the stages of the fluid evolution into gas.
authors.affiliation: Institute of Metallurgy, Ural Division of Russian Academy of Sciences, 620016 Yekaterinburg, Russia.
authors.forename: R E
authors.initials: RE
authors.lastname: Ryltsev
authors.affiliation: Moscow Institute of Physics and Technology, 141700 Moscow, Russia.
authors.forename: N M
authors.initials: NM
authors.lastname: Chtchelkatchev