Field driven charging dynamics of a fluidized granular bed

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 fr...

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Bibliographic Details
Published in:Soft matter 2016-01, Vol.12 (29), p.6261-6267
Main Authors: Yoshimatsu, R, Araújo, N. A. M, Shinbrot, T, Herrmann, H. J
Format: Article
Language:English
Subjects:
Charging
Dynamics
Electrostatics
Fluidized beds
Grains
Heterogeneity
Mathematical models
Surface charge
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Summary: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. A numerical study predicts strong heterogeneities in charging inside an agitated granular bed induced by a constant applied electric field in the vertical direction.
ISSN:1744-683X
1744-6848
DOI:10.1039/c6sm00357e