Far-from-equilibrium Ostwald ripening in electrostatically driven granular powders

Details Far-from-equilibrium Ostwald ripening in electrostatically driven granular powders Far-from-equilibrium Ostwald ripening in electrostatically driven granular powders

2004-11-19

arxiv.org/abs/cond-mat/0411522v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, to appear in PRE

Scientific paper

10.1103/PhysRevE.71.011307

We report the first experimental study of cluster size distributions in electrostatically driven granular submonolayers. The cluster size distribution in this far-from-equilibrium process exhibits dynamic scaling behavior characteristic of the (nearly equilibrium) Ostwald ripening, controlled by the attachment and detachment of the "gas" particles. The scaled size distribution, however, is different from the classical Wagner distribution obtained in the limit of a vanishingly small area fraction of the clusters. A much better agreement is found with the theory of Conti et al. [Phys. Rev. E 65, 046117 (2002)] which accounts for the cluster merger.

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