Transport coe cients for dense hard - disk system s
نویسنده
چکیده
A studyofthetransportcoe cientsofasystem ofelastichard disks,based on theuseofHelfandEinstein expressions is reported. The self-di usion,the viscosity,and the heat conductivity are exam ined with averaging techniques especially appropriate for the use in event-driven m olecular dynam icsalgorithm swith periodic boundary conditions. The density and size dependence ofthe resultsis analyzed,and com parison with the predictions from Enskog’s theory is carried out. In particular,the behaviorofthe transportcoe cients in the vicinity ofthe uid-solid transition is investigated and a strikingpowerlaw divergenceoftheviscosity in thisregion isobtained,whileall otherexam ined transportcoe cientsshow a drop in thatdensity range-in relation to theEnskog prediction. PACS num bers:05.60.-k,02.70.Ns,05.20.Dd
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