The apparent surface roughness of moving sand transported by wind

Details The apparent surface roughness of moving sand transported by wind The apparent surface roughness of moving sand transported by wind

2011-11-05

arxiv.org/abs/1111.1340v1

Physics

Condensed Matter

Soft Condensed Matter

38 pages, 17 figures

Scientific paper

We present a comprehensive analytical model of aeolian sand transport in saltation. It quantifies the momentum transfer from the wind to the transported sand by providing expressions for the thickness of the saltation layer and the apparent surface roughness. These expressions are for the first time entirely derived from basic physical principles. The model further predicts the sand transport rate (mass flux) and the impact threshold shear velocity. We show that the model predictions are in very good agreement with experiments and numerical state of the art simulations of aeolian saltation.

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