Signal Propagation through Dense Granular Media

ORAL

Abstract

We consider propagation of signals through dense granular systems. The results are obtained by relatively large scale (up to 40,000 particles) discrete element simulations in two spatial dimensions. The properties of the signals are used to deduce the basic physical mechanisms of the force and energy transmission. In addition, we discuss the possibility of developing effective models for signal propagation which bridge the spatial scales between micro (grain scale) and meso (hundreds or thousands of grains) description of granular systems. We also discuss the influence of force anisotropy on the characteristics of the propagating signal. Finally, we will present preliminary results regarding signal propagation through dynamic (sheared) granular system.

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Authors

  • Lou Kondic

    • New Jersey Institute of Technology
    • Department of Mathematical Sciences, New Jersey Institute of Technology

  • Bob Behringer

    • Duke University
    • Physics Department and Center for Nonlinear and Complex Systems, Duke University, Durham, NC - 27708
    • Department of Physics and Center for Nonlinear and Complex Systems
    • Physics Dept., Duke University
    • Physics Department and Center for Nonlinear and Complex Systems, Duke University, Durham, NC -- 27708