%0 Journal Article
%T A note on the upward and downward intruder segregation in granular media
%A L. Trujillo
%A H. J. Herrmann
%J Physics
%D 2002
%I arXiv
%X The intruder segregation dependence on size and density is investigated in the framework of a hydrodynamic theoretical model for vibrated granular media. We propose a segregation mechanism based on the difference of densities between different regions of the granular system, which give origin to a buoyant force that acts on the intruder. From the analytic solution of the segregation velocity we can analyze the transition from the upward to downward intruder's movement.
%U http://arxiv.org/abs/cond-mat/0211435v1