Zusammenfassung
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.
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