Signal propagation through dense granular systems

Details Signal propagation through dense granular systems Signal propagation through dense granular systems

2008-05-14

arxiv.org/abs/0805.2051v1

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 4 figures

Scientific paper

The manner in which signals propagate through dense granular systems in both space and time is not well understood. In order to learn more about this process, we carry out discrete element simulations of the system response to excitations where we control the driving frequency and wavelength independently. Fourier analysis shows that properties of the signal depend strongly on the spatial and temporal scales introduced by the perturbation. The features of the response provide a test-bed for any continuum theory attempting to predict signal properties. We illustrate this connection between micro-scale physics and macro-scale behavior by comparing the system response to a simple elastic model with damping.

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