title: Dynamically induced effective interaction in periodically driven granular mixtures.
abstract: We show that a granular mixture subject to horizontal oscillations can be reduced to a monodisperse system of particles interacting via an effective interaction. This interaction is attractive at short distances and strongly anisotropic, and its features explain the system rich phenomenology, including segregation and stripe pattern formation. Finally, we show that a modified Cahn-Hilliard equation, which takes into account the characteristics of the effective interaction, is capable of describing the dynamics of the mixture.
authors.affiliation: Dipartimento di Scienze Fisiche, Universitá di Napoli 'Federico II', CNR-Coherentia, INFN, 80126 Napoli, Italia. picaciamarra@na.infn.it
authors.forename: Massimo Pica
authors.initials: MP
authors.lastname: Ciamarra
authors.forename: Antonio
authors.initials: A
authors.lastname: Coniglio
authors.forename: Mario
authors.initials: M
authors.lastname: Nicodemi
mesh_terms: D000465:Algorithms; D045424:Complex Mixtures / Q000737:chemistry*; D003198:Computer Simulation; D008863:Microspheres
chemical_list: D045424:Complex Mixtures