Dynamical correlations in Brownian hard rods
- 26 April 2006
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 124 (16), 164903
- https://doi.org/10.1063/1.2189243
Abstract
We analyze the time decay of small amplitude density perturbations in systems of highly packed Brownian hard rods, relaxing towards a uniform density distribution. The results of Brownian dynamics simulations and those of the deterministic dynamic density functional (DDF) theory, are contrasted with a new theoretical approach beyond the DDF assumptions. We characterize dynamical correlation modes which, having the lowest relaxation time, determine the late time evolution of the system. The spectrum of possible time decays has a continuous band structure, with pockets of discrete values, near the minima of the DDF results, where the validity of that theory appears to be well established.Keywords
This publication has 13 references indexed in Scilit:
- Time-Dependent Density Functional Theory of Classical FluidsPhysical Review Letters, 2005
- Mode-coupling theory and the glass transition in supercooled liquidsReviews of Modern Physics, 2004
- Dynamic density functional theory for steady currents: Application to colloidal particles in narrow channelsThe Journal of Chemical Physics, 2003
- Mean-field dynamical density functional theoryJournal of Physics: Condensed Matter, 2003
- Microfluidic Diffusion-Based Separation and DetectionScience, 1999
- Liquid Morphologies on Structured Surfaces: From Microchannels to MicrochipsScience, 1999
- Langevin equation for the density of a system of interacting Langevin processesJournal of Physics A: General Physics, 1996
- Stochastic model of slow dynamics in supercooled liquids and dense colloidal suspensionsPhysica A: Statistical Mechanics and its Applications, 1994
- The nature of the liquid-vapour interface and other topics in the statistical mechanics of non-uniform, classical fluidsAdvances in Physics, 1979
- Equilibrium state of a classical fluid of hard rods in an external fieldJournal of Statistical Physics, 1976