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Chaos / Volume 21 / Issue 4 / GALLERY OF NONLINEAR IMAGES
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Chaos 21, 041107 (2011); http://dx.doi.org/10.1063/1.3669495 (1 page)

How granular materials jam in a hopper

J. Tang and R. P. Behringer

Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA

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(Received 29 August 2011; published online 20 December 2011)

Abstract unavailable.

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KEYWORDS and PACS

Keywords

flow visualisation, granular flow, granular materials, jamming

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3669495

PUBLICATION DATA

ISSN

1054-1500 (print)  
1089-7682 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

  1. R. M. Nedderman, Statics and Kinematices of Granular Materials (Cambridge University Press, Cambridge, 1973).
  2. K. Kamrin and M. Z. Bazant, Phys. Rev. E 75, 041301 (2007).
  3. J. Tang, S. Sagdiphour, and R. P. Behringer, AIP Conf. Proc. 1145, 515 (2009)APCPCS001145000001000515000001
    see http://link.aip.org/link/?APC/1145/515/1.
  4. N. Mori and K.-A. Chang, Introduction to mpiv (2003), see http://www.oceanwave.jp/softwares/mpiv/.

Figures (click on thumbnails to view enlargements)

FIG.1
(Color) (a) Post processed particle tracking image shows particles (brightly colored) that eventually form a jamming arch, shown in the inset. These particles start from different angular regions of the hopper. It is not possible to predict which particles will jam the hopper. (b)-(c) Vertical velocity (y component) at two frames separated by 0.05 s. (b) The velocity is only large near the outlet. (c) The velocity is large higher in the hopper (enhanced online) [URL: http://dx.doi.org/10.1063/1.3669495.1 ].

FIG.1 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.2
(Color) (a) Photoelastic particles show intensity fringes under stress. (b) An example showing a photoelastic images for a jammed state.

FIG.2 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

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