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Trinity College Dublin

Spatial Correlations of two dimensional packings

Research Field: 
Physics
Resource Type: 
Storage
Resource Type: 
Compute
Resource Class: 
C
Lead PI: 
Dr. Matthias Moebius
Abstract: 
We investigate next nearest neighbor correlations of the contact number in simulations of polydis- perse, frictionless, packings in two dimensions. We find that discs with few contacting neighbors are predominantly in contact with discs that have many neighbors and vice versa at all packing fractions. This counter-intuitive result can be explained by drawing a direct analogy to the Aboav-Weaire law in cellular structures. We find an empirical one parameter relation similar to the Aboav-Weaire law that satisfies an exact sum rule constraint. Surprisingly, there are no correlations in the radii between neighboring particles, despite correlations between contact number and radius.
Start Date: 
07/2011
Duration: 
12.00months

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