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Barchan dune's size distribution induced by collisions | | O. Durán
; V. Schawaemmle
; H.J. Herrmann
; | | Date: |
16 Jan 2007 | | Subject: | Soft Condensed Matter | | Abstract: | Large dune fields can overrun for instance infrastructures lying in the way of their motion. Unidirectional wind fields and low sand availability give rise to single barchan dunes moving in the direction of wind. They can interact by directly exchanging their sand through collisions. This kind of interaction play a crucial role in the evolution of barchan dune fields, for instance in the selection of a characteristic dune size. Simulations of dune collisions with lateral offset are studied systematically and described by general phenomenological rules. Moreover, simulations with a simplified model without sand flux considering only collisions show that the sizes of sand dunes in such a scenario follow a Gaussian distribution with a well defined characteristic size. | | Source: | arXiv, cond-mat/0701370 | | Services: | Forum | Review | PDF | Favorites | |
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