A self-consistent theory of matter transport in a random lattice gas and some simulation results

Abstract Linear response formulae for the phenomenological atomic transport coefficients LXY of non-equilibrium thermodynamics are analysed for the randomlattice-gas model in which all configurations have the same energy. A new self-consistent decoupling of the associated hierarchy of kinetic equations for time-dependent correlation functions is employed. For a binary system with an atom jump-rate ratio of ten to one for the two components the agreement with Monte Carlo simulations is generally good for both tracer and non-tracer coefficients and is more complete than for earlier theories. New Monte Carlo simulation results for non-tracer coefficients in a simple cubic binary random lattice gas are presented.

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