Anomalous Fourier's law and long range correlations in a 1D non-momentum conserving mechanical model

Details Anomalous Fourier's law and long range correlations in a 1D non-momentum conserving mechanical model Anomalous Fourier's law and long range correlations in a 1D non-momentum conserving mechanical model

2010-07-22

arxiv.org/abs/1007.3798v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, 11 figures

Scientific paper

We study by means of numerical simulations the velocity reversal model, a one-dimensional mechanical model of heat transport introduced in 1985 by Ianiro and Lebowitz. Our numerical results indicate that this model, although it does not conserve momentum, exhibits an anomalous Fourier's law similar to the ones previously observed in momentum-conserving models. This is contrary to what is obtained from the solution of the Boltzmann equation (BE) for this system. The pair correlation velocity field also looks very different from the correlations usually seen in diffusive systems, and shares some similarity with those of momentum-conserving heat transport models.

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