Stress stress correlation-functions in lattice gases beyond Boltzmann approximation



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Brito, Ricardo and Van Velzen, G. A. and Ernst, M. H. (1993) Stress stress correlation-functions in lattice gases beyond Boltzmann approximation. Journal of Statistical Physics , 70 (03-abr). pp. 811-832. ISSN 0022-4715


The complete time dependence of the stress-stress correlation functions in lattice gas cellular automata is calculated from the ring kinetic theory using numerical and analytical methods. This provides corrections, typically of 10-20%, to the usual molecular chaos calculations, where correlation functions decay exponentially. The resulting correlation function crosses over from an initial exponential decay to the long-time behavior calculated from mode coupling theory. The present theory, applied to the viscosity, accounts for a substantial part of the observed difference between the Boltzmann theory and simulations.

Item Type:Article
Uncontrolled Keywords:Velocity Autocorrelation Function, Cellular-Automata Fluids, Mode-Coupling Theory, Long-Time Tails, Faster-Than-T-1 Decay
Subjects:Sciences > Physics > Thermodynamics
ID Code:22099
Deposited On:03 Jul 2013 09:57
Last Modified:24 Jul 2018 11:51

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