Velocity Autocorrelations for Hard Spheres
- 5 June 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 18 (23), 988-990
- https://doi.org/10.1103/physrevlett.18.988
Abstract
A study of the velocity autocorrelation function for hard spheres over the entire fluid density region shows that deviations from exponential behavior are small. At very low density a small positive deviation is found which is accounted for in the Boltzmann theory of the self-diffusion coefficient. At higher densities the principal non-Markovian process is identified with a surprisingly long persistence of velocity currents. At still higher densities, near solidification, anticorrelating backscattering events predominate.Keywords
This publication has 3 references indexed in Scilit:
- Van der Waals Theory of Transport in Dense FluidsThe Journal of Chemical Physics, 1966
- Studies in Molecular Dynamics. I. General MethodThe Journal of Chemical Physics, 1959
- Transport Properties of a Dense Fluid of Hard SpheresThe Journal of Chemical Physics, 1956