Dynamics of expanding holes in vertically vibrated wet granules

H. Ebata, S. Tatsumi, M. Sano

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

Abstract

Surface instability of vertically vibrated suspension of various dispersed powder and silicone oil is investigated in quasi 2-D and 1-D system. As the acceleration of vibration exceeds a critical value, flat surface became unstable against a finite amplitude perturbation. We observe instabilities as an expanding hole, segregation between empty and filled space and a viscous finger-like pattern. Noticeable feature of these instabilities is that the only frequency of the vibration and packing fraction strongly affect the onset acceleration. In addition, we find that former two instabilities have convection like flow at their rim and the stability of an expanding hole or segregated condition depends on that of convection like flow.

Original languageEnglish
Title of host publicationPowders and Grains 2009 - Proceedings of the 6th International Conference on Micromechanics of Granular Media
Pages733-736
Number of pages4
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009 - Golden, CO, United States
Duration: Jul 13 2009Jul 17 2009

Publication series

NameAIP Conference Proceedings
Volume1145
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009
CountryUnited States
CityGolden, CO
Period7/13/097/17/09

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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