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A simple model for nonequilibrium fluctuations in a fluid

 

作者: Florence Baras,   M. Malek Mansour,   Alejandro L. Garcia,  

 

期刊: American Journal of Physics  （AIP Available online 1996）
卷期: Volume 64, issue 12  

页码: 1488-1495

 

ISSN:0002-9505

 

年代: 1996

 

DOI:10.1119/1.18451

 

出版商: American Association of Physics Teachers

 

关键词: FLUCTUATIONS;FREE ENERGY;THERMODYNAMICS;CORRELATION FUNCTIONS;HYDRODYNAMICS;DISTRIBUTION FUNCTIONS;03.40;05.40;05.70;50.

 

数据来源: AIP

 

摘要:

In equilibrium systems, thermal fluctuations are correlated in time (fluctuation–dissipation theorem) yet their instantaneous values are uncorrelated in space over macroscopic distances. Out of equilibrium, long range spatial correlations are predicted by theory and have been observed in both laboratory experiments and computer simulations. In this paper, we present a simple model, called the train model, that illustrates this phenomenon. The theoretical analysis of the model and its connection with fluctuating hydrodynamics are outlined.

 

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