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Spreading of triboelectrically charged granular matter.

ABSTRACT: We report on the spreading of triboelectrically charged glass particles on an oppositely charged surface of a plastic cylindrical container in the presence of a constant mechanical agitation. The particles spread via sticking, as a monolayer on the cylinder's surface. Continued agitation initiates a sequence of instabilities of this monolayer, which first forms periodic wavy-stripe-shaped transverse density modulation in the monolayer and then ejects narrow and long particle-jets from the tips of these stripes. These jets finally coalesce laterally to form a homogeneous spreading front that is layered along the spreading direction. These remarkable growth patterns are related to a time evolving frictional drag between the moving charged glass particles and the countercharges on the plastic container. The results provide insight into the multiscale time-dependent tribolelectric processes and motivates further investigation into the microscopic causes of these macroscopic dynamical instabilities and spatial structures.

SUBMITTER: Kumar D

PROVIDER: S-EPMC4053699 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature

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Spreading of triboelectrically charged granular matter.

Kumar Deepak D Sane A A Gohil Smita S Bandaru P R PR Bhattacharya S S Ghosh Shankar S

Scientific reports 20140612

We report on the spreading of triboelectrically charged glass particles on an oppositely charged surface of a plastic cylindrical container in the presence of a constant mechanical agitation. The particles spread via sticking, as a monolayer on the cylinder's surface. Continued agitation initiates a sequence of instabilities of this monolayer, which first forms periodic wavy-stripe-shaped transverse density modulation in the monolayer and then ejects narrow and long particle-jets from the tips o ...[more]

PMID: 24919483

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Spreading of triboelectrically charged granular matter.

Publications

Spreading of triboelectrically charged granular matter.

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