Flow and jam of granular particles in a two-dimensional hopper

Kiwing To, Pik Yin Lai, H. K. Pak

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations


The jamming phenomenon of granular flow of mono-disperse disks in a two-dimensional hopper is studied experimentally. When the opening of the hopper d is small, jamming occurs due to formation of an arch at the hopper opening. The jamming probability as a function of the hopper opening width is measured which show a sharp decrease at some range of d. By observing the disk configurations of the arch in the jamming events, the jamming probability can be explained quantitatively using a restricted random walker model. The average horizontal and vertical spans of the jamming arch are calculated from the restricted random walk model which compares favorably with experiments.

Original languageEnglish
Pages (from-to)174-180
Number of pages7
JournalPhysica A: Statistical Mechanics and its Applications
Issue number1-2
StatePublished - 15 Nov 2002
EventSlow Dynamical Processes in Nature - Seoul, Korea, Republic of
Duration: 25 Nov 200127 Nov 2001


  • Granular flow
  • Jamming


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