Correlated motion of two particles in a dense fluid of hard rods

B. Gaveau, M. Moreau and J. Piasecki

Physica A: Statistical Mechanics and its Applications, 1997, vol. 237, issue 1, 189-204

Abstract: An exact equation describing the stochastic motion of a droplet of neighbouring equal mass hard points with velocities ±c, immerzed in a hard point fluid, is derived. The derivation generalizes Resibois' idea originally applied to the study of self-diffusion. The explicit solution for a two-particle droplet is obtained, showing a rapid relaxation of the interparticle distance to the Poisson distribution, superposed on a slow diffusive motion of the centre of mass of the two particles. An approximate description of the dynamics of N-particle droplets (N > 2) is proposed.

Date: 1997
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:237:y:1997:i:1:p:189-204

DOI: 10.1016/S0378-4371(96)00416-5

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