Publications [#245580] of Robert P. Behringer

Papers Published
  1. Tennakoon, SGK; Behringer, RP, Vertical and horizontal vibration of granular materials: Coulomb friction and a novel switching state, Physical Review Letters, vol. 81 no. 4 (1998), pp. 794-797 .

    Experiments for simultaneous horizontal (h) and vertical (v) vibration of granular materials show novel flow dynamics. We focus on moderate dimensionless accelerations 0 < Γh.v < 1.6. Phenomena include the spontaneous formation of a static heap at Γhs (Γv,) when Γv < 1, convective flow for Γhe > Γhs, and a novel switching state for frequencies ωv ≠ ωh. A simple friction model provides an approximate, but not exact, description of the steady states and the transition to convection.