@inproceedings{0e21486e82944992a053a62c58409fb5,
title = "Acoustic waves in granular materials",
abstract = "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.",
keywords = "METIS-249790, rotation, micro-macro theory, Sound propagation, Granular matter, DEM simulation, Friction, IR-80320",
author = "O.J.P. Mouraille and Stefan Luding",
note = "Paper ID 1752, Session S02: Nonlinear acoustics of granular media ; International Congress on Ultrasonics 2007, ICU 2007 ; Conference date: 09-04-2007 Through 12-04-2007",
year = "2008",
month = apr,
day = "9",
doi = "10.3728/ICUltrasonics.2007.Vienna.1752_mouraille",
language = "English",
publisher = "Vienna University of Technology",
pages = "1--4",
booktitle = "Proceedings International Congress on Ultrasonics, 9-12 April 2007, Vienna, Austria (on cd-rom)",
address = "Austria",
}