1997/11/21 by S. N. Dorogovtsev, S. N Dorogovtsev
Engineering · Physics and Astronomy · #Granular flow and fluidized beds #Nonlinear Photonic Systems #Theoretical and Computational Physics #adap-org #chao-dyn #cond-mat #nlin.AO #nlin.CD #physics.class-ph
paper · pdf · doi:10.1209/epl/i1998-00106-9
9 pages (LaTeX) and 2 Postscript figures, to be published in Europhys. Lett
arxiv created 1997/11/21 · openalex publication_date 1998/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Mixing of two fractions of a granular material in a slowly rotating two-dimensional drum is considered. The rotation is around the axis of the upright drum. The drum is filled partially, and mixing occurs only at the free surface of the material. We propose a simple theory of the mixing process which describes a real experiment surprisingly well. The dependence of the mixing time on the drum filling is calculated. The mixing time is infinite in the case of the half-filled drum. We describe the singular behaviour of mixing near this critical point.