Título:
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Stress stress correlation-functions in lattice gases beyond Boltzmann approximation
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Autores:
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Brito, Ricardo ;
Van Velzen, G. A. ;
Ernst, M. H.
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Tipo de documento:
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texto impreso
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Editorial:
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Springer, 1993-02
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Termodinámica
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Tipo = Artículo
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Resumen:
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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.
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