Emergence of a Barchan Belt in a Unidirectional Flow: Experiment and Numerical Simulation

Details Emergence of a Barchan Belt in a Unidirectional Flow: Experiment and Numerical Simulation Emergence of a Barchan Belt in a Unidirectional Flow: Experiment and Numerical Simulation

2004-12-27

arxiv.org/abs/cond-mat/0412693v1

Journal of the Physical Society of Japan, Vol.74, No.3, (2005) 878-881

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 9 figures: To be published in Journal of the Physical Society of Japan

Scientific paper

10.1143/JPSJ.74.878

We observed time evolution of dune fields in a water tank experiment and
simulated it by using a simple model without taking complex fluid dynamics into
account. The initial sand bed changed its form into transverse ripples, that
is, dunes with straight crest lines perpendicular to the flow direction. Then
the crescentic shaped dunes called barchans emerged from transverse ripples.

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