Generalized Langevin equation for nonequilibrium systems

M.G. McPhie, P.J. Daivis, I.K. Snook, J. Ennis and D.J. Evans

Physica A: Statistical Mechanics and its Applications, 2001, vol. 299, issue 3, 412-426

Abstract: We derive a generalized Langevin Equation (GLE) for the evolution of an arbitrary phase variable in a classical fluid that is initially at equilibrium and is subsequently subjected to an external field and a thermostat of the type used in nonequilibrium molecular dynamics computer simulations. The nonequilibrium steady state GLE is shown to have the same form as the equilibrium GLE at long times. We use our generalized Langevin equation to derive a simple Langevin equation for the motion of a single heavy Brownian particle in a solvent under steady state planar shear.

Keywords: Langevin equation; Shear; Brownian motion (search for similar items in EconPapers)
Date: 2001
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:299:y:2001:i:3:p:412-426

DOI: 10.1016/S0378-4371(01)00328-4

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