Field Driven Charging Dynamics of a Fluidized Granular Bed

摘要

A simplified model has previously described the inductive charging ofcolliding identical grains in the presence of an external electric field. Herewe extend that model by including heterogeneous surface charge distributions,grain rotations and electrostatic interactions between grains. We find fromthis more realistic model that strong heterogeneities in charging can occur inagitated granular beds, and we predict that shielding due to theseheterogeneities can dramatically alter the charging rate in such beds.