Granular impact dynamics: Fluctuations at short time-scales


Conference Paper

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. © 2013 AIP Publishing LLC.

Full Text

Cited Authors

  • Clark, AH; Kondic, L; Behringer, RP

Published Date

  • August 1, 2013

Published In

Volume / Issue

  • 1542 /

Start / End Page

  • 445 - 448

Electronic International Standard Serial Number (EISSN)

  • 1551-7616

International Standard Serial Number (ISSN)

  • 0094-243X

International Standard Book Number 13 (ISBN-13)

  • 9780735411661

Digital Object Identifier (DOI)

  • 10.1063/1.4811963

Citation Source

  • Scopus