title: Discharge flow of a bidisperse granular media from a silo.
abstract: The discharge flow in a cylindrical and a rectangular silo using both monodisperse and bidisperse mixtures of spherical glass beads is studied experimentally. The flow rate is measured using a precision balance for a large range of particle diameters, size ratios, and outlet diameters. A simple physical model is proposed to describe the flow of bidisperse mixtures. It gives an expression for the flow rate and predicts that the bulk velocity follows a simple mixture law. This model implies that a mixture diameter cannot be simply defined. Moreover it is shown that bidisperse granular media allow for the transport of coarse particles below their jamming conditions.
authors.affiliation: Laboratoire FIMAS, Université de Béchar, Boîte Postale 417, Béchar 08000, Algeria.
authors.forename: M
authors.initials: M
authors.lastname: Benyamine
authors.affiliation: Laboratoire FIMAS, Université de Béchar, Boîte Postale 417, Béchar 08000, Algeria.
authors.forename: M
authors.initials: M
authors.lastname: Djermane
authors.affiliation: Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013 Marseille, France.
authors.forename: B
authors.initials: B
authors.lastname: Dalloz-Dubrujeaud
authors.affiliation: Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013 Marseille, France.
authors.forename: P
authors.initials: P
authors.lastname: Aussillous
mesh_terms: D008962:Models, Theoretical; D009038:Motion; D010316:Particle Size; D013997:Time Factors