Abstract
The decay of the collisional contribution to the shear-stress autocorrelation function is shown to be inconsistent with at −3/2 inverse-power law. The decay of the self part (a combination of pair and triplet correlations) indicates a stretched-exponential decay with a density-independent exponent. The pair contribution by itself also shows stretched-exponential behavior in both two and three dimensions, with different, but still density-independent, exponents. At very long times this stretched-exponential decay of the pair correlations switches over to an algebraic decay, consistent with the diffusional separation of pairs of particles.
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Ladd, A.J.C., Alder, B.J. Decay of angular correlations in hard-sphere fluids. J Stat Phys 57, 473–482 (1989). https://doi.org/10.1007/BF01022817
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DOI: https://doi.org/10.1007/BF01022817