Transport coefficients for dense hard-disk systems

Details Transport coefficients for dense hard-disk systems Transport coefficients for dense hard-disk systems

2005-11-28

arxiv.org/abs/cond-mat/0511671v2

Physics

Condensed Matter

Statistical Mechanics

submitted to PRE

Scientific paper

10.1103/PhysRevE.74.061305

A study of the transport coefficients of a system of elastic hard disks, based on the use of Helfand-Einstein expressions is reported. The self-diffusion, the viscosity, and the heat conductivity are examined with averaging techniques especially appropriate for the use in event-driven molecular dynamics algorithms with periodic boundary conditions. The density and size dependence of the results is analyzed, and comparison with the predictions from Enskog's theory is carried out. In particular, the behavior of the transport coefficients in the vicinity of the fluid-solid transition is investigated and a striking power law divergence of the viscosity in this region is obtained, while all other examined transport coefficients show a drop in that density range.

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