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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Generating and Quantifying Structure in Granular a
 nd Cellular Structures - Delaney\, G (CSIRO)
DTSTART;TZID=Europe/London:20140225T101500
DTEND;TZID=Europe/London:20140225T110000
UID:TALK51078AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/51078
DESCRIPTION:We explore methods for the generation and analysis
  of simulated packings of granular and cellular st
 ructures. We consider a range of systems from simp
 le random and ordered sphere packings\, to packing
 s of complex non-spherical shapes in 2D and 3D. We
  show how a simple bubble model for wet foams comp
 rised of near spherical bubbles can be used to mod
 el the coarsening of wet foams\, recreating severa
 l of the structural features seen when wet bubble 
 crystals evolve due to bubble shrinkage at the sur
 face of the foam. By utilising a range of order pa
 rameters to quantify structure\, we are able to re
 late how features at the individual grain level af
 fect the macroscopic properties of the system. Ani
 sotropy and broken rotational symmetry at the loca
 l level are demonstrated to be of key importance i
 n determining the macroscopic properties of granul
 ar systems in the packed stated. We are also able 
 to decompose the contribution from the geometric s
 hape of the grain\, the inter-grain interac tion p
 roperties and the preparation method. Applications
  of these techniques in understanding initiation a
 nd evolution of landslides and the evolution of sh
 ape and size distribution due to particle breakage
  will be discussed. \n
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:Mustapha Amrani
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