title: Field driven charging dynamics of a fluidized granular bed.
abstract: A simplified model has previously described the inductive charging of colliding identical grains in the presence of an external electric field. Here we extend that model by including heterogeneous surface charge distributions, grain rotations and electrostatic interactions between grains. We find from this more realistic model that strong heterogeneities in charging can occur in agitated granular beds, and we predict that shielding due to these heterogeneities can dramatically alter the charging rate in such beds.
authors.affiliation: Computational Physics for Engineering Materials, IfB, ETH Zurich, Wolfgang-Pauli-Street 27, 8093 Zurich, Switzerland. ryutay@phys.ethz.ch.
authors.forename: R
authors.initials: R
authors.lastname: Yoshimatsu
authors.affiliation: Departamento de Física, Faculdade de Ciéncias, Universidade de Lisboa, P-1749-016 Lisboa, Portugal and Centro de Física Teórica e Computacional, Universidade de Lisboa, P-1749-016 Lisboa, Portugal.
authors.forename: N A M
authors.initials: NA
authors.lastname: Araújo
authors.affiliation: Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey, 08854, USA.
authors.forename: T
authors.initials: T
authors.lastname: Shinbrot
authors.affiliation: Computational Physics for Engineering Materials, IfB, ETH Zurich, Wolfgang-Pauli-Street 27, 8093 Zurich, Switzerland. ryutay@phys.ethz.ch and Departamento de Física, Universidade Federal do Ceará, 60451-970 Fortaleza, Ceará, Brazil.
authors.forename: H J
authors.initials: HJ
authors.lastname: Herrmann