Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L06: Forces, Flows, and Locomotion in Granular Media
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B208
Chair: Daniel Goldman, Georgia Institute of Technology
Abstract ID: BAPS.2018.DFD.L06.1
Abstract: L06.00001 : Avalanches and force chains in a granular stick-slip experiment*
(Author Not Attending)
Presenter:
Aghil Abed Zadeh
(Duke University)
Authors:
Aghil Abed Zadeh
(Duke University)
Jonathan Barés
(Université de Montpellier LMGC)
Robert P Behringer
(Duke University)
From a more local point of view and by using high speed cameras and the photoelastic properties of our particles, we characterize the local stress change and flow of particles during avalanches. By image processing we detect the avalanches, as evolving force chains, and study their statistics in time and space. The PDFs of avalanches obey power laws both at global and local scales, but with different exponents.
*NSF-DMR1206351, NASA NNX15AD38G, The William M. Keck Foundation and DARPA grant 4-34728
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L06.1
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