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SUMMARY:Generating and Quantifying Structure in Granular and Cellular Stru
 ctures - Delaney\, G (CSIRO)
DTSTART:20140225T101500Z
DTEND:20140225T110000Z
UID:TALK51078@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We explore methods for the generation and analysis of simulate
 d packings of granular and cellular structures. We consider a range of sys
 tems from simple random and ordered sphere packings\, to packings of compl
 ex non-spherical shapes in 2D and 3D. We show how a simple bubble model fo
 r wet foams comprised of near spherical bubbles can be used to model the c
 oarsening of wet foams\, recreating several of the structural features see
 n when wet bubble crystals evolve due to bubble shrinkage at the surface o
 f the foam. By utilising a range of order parameters to quantify structure
 \, we are able to relate how features at the individual grain level affect
  the macroscopic properties of the system. Anisotropy and broken rotationa
 l symmetry at the local level are demonstrated to be of key importance in 
 determining the macroscopic properties of granular systems in the packed s
 tated. We are also able to decompose the contribution from the geometric s
 hape of the grain\, the inter-grain interac tion properties and the prepar
 ation method. Applications of these techniques in understanding initiation
  and evolution of landslides and the evolution of shape and size distribut
 ion due to particle breakage will be discussed. \n
LOCATION:Seminar Room 1\, Newton Institute
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