Publications [#245469] of Robert P. Behringer

Papers Published
  1. Geng, J; Behringer, RP, Diffusion, mobility and failure for a stirred granular system, in Powders and Grains, 2005, edited by R. Garcia-Rojo, and H. J. Herrmann, Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media, vol. 2 (2005), pp. 933-937, Balkema .

    We describe experimentsto determine diffusivity and mobilityin a stirred densegranular system. We find that the diffusion is well described as simple Brownian. We find that the force to push a tracer through a surrounding sea of particles is almost independent of pushing speed, modulo a slow logarithmic increase. We model the pushing experiments, borrowing from a spring-failure model proposed by Khang et al. The agreement between experiment and model is substantial. © 2005 Taylor & Francis Group.