Energy transport through dense granular matter

Lou Kondic, X. Fang, O. M. Dybenko, R. P. Behringer

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

Abstract

In order to probe the process of energy propagation through dense granular systems, we carry out discrete element simulations of the system response to excitations where we control the driving frequency and wavelength independently. The soft-disk simulations are carried out in two spatial dimensions, and include the effects of energy loss due to inelasticity of collisions, frictional damping, rotations, and polydispersity. Our ability to control independently spatial and temporal properties of the imposed perturbations allows us to extract significant new information. In particular, Fourier analysis of the system response shows that properties of the propagating signal strongly depend on the spatial scales introduced by the perturbation itself. Then, we consider a sheared granular system and discuss how shearing influences the nature of the propagating signal. The simulations are carried out using realistic system sizes and material properties, allowing for direct experimental verification of the obtained results.

Original languageEnglish (US)
Title of host publicationPowders and Grains 2009 - Proceedings of the 6th International Conference on Micromechanics of Granular Media
Pages293-296
Number of pages4
Volume1145
DOIs
StatePublished - Nov 27 2009
Event6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009 - Golden, CO, United States
Duration: Jul 13 2009Jul 17 2009

Other

Other6th International Conference on Micromechanics of Granular Media, Powders and Grains 2009
CountryUnited States
CityGolden, CO
Period7/13/097/17/09

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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