Non-equilibrium fluctuations of a Rayleigh particle in a two-component gas

E. Javier Vitela and Manuel Coronado

Physica A: Statistical Mechanics and its Applications, 1989, vol. 157, issue 3, 1180-1194

Abstract: A double system size expansion technique is used to study the fluctuations of a Rayleigh piston in a two-component gas. The macroscopic law for the most probable path of the velocity of the particle is obtained; and using the linear noise approximation the characteristics of the fluctuations around this path are determined, for both, fluctuations near equilibrium and far from equilibrium. The mean and variance of the fluctuations, the velocity-velocity correlation function and the diffusion coefficient in the configuration space are calculated. The generalization to the case where the gas is composed by more than two different types of molecules is straightforward.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:157:y:1989:i:3:p:1180-1194

DOI: 10.1016/0378-4371(89)90038-1

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