Electrostatics in wind-blown sand

Details Electrostatics in wind-blown sand Electrostatics in wind-blown sand

2007-11-08

arxiv.org/abs/0711.1341v1

Physics

Condensed Matter

Other Condensed Matter

4 journal pages, 5 figures, and supplementary material. Article is in press at PRL

Scientific paper

10.1103/PhysRevLett.100.014501

Wind-blown sand, or "saltation," is an important geological process, and the primary source of atmospheric dust aerosols. Significant discrepancies exist between classical saltation theory and measurements. We show here that these discrepancies can be resolved by the inclusion of sand electrification in a physically based saltation model. Indeed, we find that electric forces enhance the concentration of saltating particles and cause them to travel closer to the surface, in agreement with measurements. Our results thus indicate that sand electrification plays an important role in saltation.

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