KINETIC STRUCTURE OF A 2-DIMENSIONAL LIQUID

被引:276
作者
HURLEY, MM
HARROWELL, P
机构
[1] Department of Physical and Theoretical Chemistry, University of Sydney, Sydney
关键词
D O I
10.1103/PhysRevE.52.1694
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
On an intermediate time scale, a molecular dynamics simulation of a two-dimensional (2D) liquid of soft disks exhibits dramatic structural and kinetic inhomogeneities. We introduce a local relaxation time (defined as the time required for a particle to first travel a distance r from its initial position) in order to present a quantitative analysis of this kinetic structure. The length r is chosen so as to maximize the resolution of the kinetic structure. This analysis produces a natural measure of cooperativity. We demonstrate that caging in the 2D liquid takes place in a subset of particles only, distributed as transient clusters throughout the liquid.
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页码:1694 / 1698
页数:5
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