Iván, S. (Sánchez)

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    Sinking of light intruders in a shaken granular bed
    (2010-06-23) Gustavo, G. (Gutierrez); Zuriguel-Ballaz, Í. (Íker); Maza-Ozcoidi, D. (Diego); Iván, S. (Sánchez)
    We present an experimental study of the displacement of a light intruder immersed in a vibrated granular bed. Using high speed video we resolve the motion, during one cycle of oscillation, of a cylindrical object inside a Plexiglas box partially filled with grains. We report experimental evidence that, in the absence of convection, at least two forces are behind the intruder’s motion: an air drag force—due to the airflow through the granular bed—and a buoyancy force produced by an air-mediated granular fluid.