On the possibility of collective vortex motion in liquids

It is shown that a model system of random walk of particles with superimposed vortex motion simulates the specific behaviors of a two-particle correlation function DP(t) = aOE (c)[r (i) (t) - r (i) (0)]aEuro cent[r (k) (t) - r (k) (0)]>, which are observed in molecular dynamics models of water and liquid argon. Hence, in liquids there well may be mesoscopic-sized vortices (of the order of ten intermolecular distances).