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Journal of Arid Land

Article Title

Evolution of crescent-shaped sand dune under the influence of injected sand flux: scaling law and wind tunnel experiment

Abstract

This paper studies the evolution of crescent-shaped dune under the influence of injected flux. A scaling law and a wind tunnel experiment are carried out for comparison. The experiment incorporates a novel image processing algorithm to recover the evolutionary process. The theoretical and experimental results agree well in the middle stage of dune evolution, but deviate from each other in the initial and final stages, suggesting that the crescent-shaped dune evolution is intrinsically scale-variant and that the crescent shape breaks down under unsaturated condition.

Keywords

crescent-shaped sand dune; scale-invariant model; wind tunnel experiment; image processing

First Page

270

Last Page

277

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