Granular impact dynamics: Fluctuations at short time-scales

Abram H. Clark, Lou Kondic, R. P. Behringer

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

5 Scopus citations

Abstract

Several recent studies on granular impact have used a macroscopic force law which describes the slow (mean) dynamics. However, these force-law models must be modified to capture large fluctuations at short time-scales. Here, we discuss granular impact experiments using photoelastic particles, where high-speed video captures both the intruder dynamics and the local granular force response. We show how to systematically separate the fluctuations from the mean dynamics. We also show that these fluctuations are multiplicative with the mean force, and otherwise decoupled from the dynamics. These observations are instructive in connecting to microscopic processes which generate the fluctuations.

Original languageEnglish (US)
Title of host publicationPowders and Grains 2013 - Proceedings of the 7th International Conference on Micromechanics of Granular Media
Pages445-448
Number of pages4
DOIs
StatePublished - 2013
Event7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013 - Sydney, NSW, Australia
Duration: Jul 8 2013Jul 12 2013

Publication series

NameAIP Conference Proceedings
Volume1542
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other7th International Conference on Micromechanics of Granular Media: Powders and Grains 2013
CountryAustralia
CitySydney, NSW
Period7/8/137/12/13

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Keywords

  • Fluctuations
  • Granular
  • Impact

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