Pattern transitions in a granular fluid system

Bjørnar Sandnes*, Henning Arendt Knudsen, Eirik Grude Flekkøy, K. J. Måløy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

A branching labyrinth of granular material emerges when a confined granular fluid system is slowly drained. From a series of experiments, simulations and theoretical modeling, we explain the mechanism for the pattern formation in terms of the forces involved. We further show that the granular fluid system undergoes a series of transitions whereby new types of patterns develop as the volume fraction of granular material is increased. A balloon pattern is demonstrated, generated by the sudden inflation of air through narrow necks in the densely packed granular front.

Original languageEnglish
Title of host publicationPowders and Grains 2009 - Proceedings of the 6th International Conference on Micromechanics of Granular Media
Pages1051-1054
Number of pages4
Volume1145
DOIs
Publication statusPublished - 2009
Event6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009 - Golden, CO, United States
Duration: 13 Jul 200917 Jul 2009

Other

Other6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009
CountryUnited States
CityGolden, CO
Period13/07/0917/07/09

Keywords

  • Drying
  • Granular media
  • Instability
  • Labyrinth
  • Non-equilibrium
  • Pattern formation
  • Phase transitions

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