Acoustic waves in granular materials

O.J.P. Mouraille, Stefan Luding

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Dynamic simulations with discrete elements are used to obtain more insight into the wave propagation in dense granular media. A small perturbation is created on one side of a dense, static packing and examined during its propagation until it arrives at the opposite side. The influence of polydispersity is studied by randomly varying the particle sizes by a tiny amount. A size variation comparable to (or larger than) the typical contact deformation, considerably changes sound propagation, i.e., the transmission spectrum becomes discontinuous and lower frequencies are transmitted better in the polydisperse packing. The inter-particle friction affects the dispersion relation, it increases the propagation speed and leads to an extended linear, large wavelength regime.
Original languageEnglish
Title of host publicationProceedings International Congress on Ultrasonics, 9-12 April 2007, Vienna, Austria (on cd-rom)
Place of PublicationWien
PublisherVienna University of Technology
Number of pages4
Publication statusPublished - 9 Apr 2008
EventInternational Congress on Ultrasonics 2007 - Wien, Austria
Duration: 9 Apr 200712 Apr 2007

Publication series

PublisherVienna University of Technology


ConferenceInternational Congress on Ultrasonics 2007
Abbreviated titleICU 2007


  • METIS-249790
  • rotation
  • micro-macro theory
  • Sound propagation
  • Granular matter
  • DEM simulation
  • Friction
  • IR-80320


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