Particle scale dynamics in granular impact.


Journal Article

We perform an experimental study of granular impact, where intruders strike 2D beds of photoelastic disks from above. High-speed video captures the intruder dynamics and the local granular force response, allowing investigation of grain-scale mechanisms in this process. We observe rich acoustic behavior at the leading edge of the intruder, strongly fluctuating in space and time, and we show that this acoustic activity controls the intruder deceleration, including large force fluctuations at short time scales. The average intruder dynamics match previous studies using empirical force laws, suggesting a new microscopic picture, where acoustic energy is carried away and dissipated.

Full Text

Cited Authors

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

Published Date

  • December 7, 2012

Published In

Volume / Issue

  • 109 / 23

Start / End Page

  • 238302 -

PubMed ID

  • 23368273

Pubmed Central ID

  • 23368273

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.109.238302


  • eng