Selection of dune shapes and velocities Part 1: Dynamics of sand, wind and barchans

By Bruno Andreotti, P. Claudin, S. Douady. 2002

304 citations recorded by the source corpus.

Abstract:Almost fifty years of investigations of barchan dunes morphology and dynamics is reviewed, with emphasis on the physical understanding of these objects. The characteristic quantities measured on the field (shape, size, velocity) and the physical problems they rise are presented. Then, we review the dynamical mechanisms explaining the formation and the propagation of dunes. In particular a complete and original approach of the sand transport over a flat sand bed is proposed and discussed. We conclude on open problems by outlining future research directions.

Subfields: Earth-Surface Processes, Ocean Engineering

View Paper: https://www.semanticscholar.org/paper/231a8ad8737b4a9ee598819d5e9aa247c1d56f60

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Earth-Surface Processes

In Ocean Engineering

Citations in the corpus

A two-species model of aeolian sand transport (2004, methodology): “Since the air is not involved in the ejection process, the ejection velocity should scale on √ gd which can be interpreted as the velocity necessary to escape from the potential trapping at the surface of the sand bed (Quartier et al. 2000; Andreotti et al. 2002a).”
The physics of wind-blown sand and dust (2012, background): “Indeed, the turbulent nature of the flow over the dune leads to nonlinear hydrodynamic effects in the shear stress perturbation (Stam 1997, van Boxel et al 1999, Kroy et al 2002, Andreotti et al 2002a, Fourrière et al 2010).”
On aeolian transport: Grain-scale interactions, dynamical mechanisms and scaling laws (2011, background): “…understanding and the quantitative description of sand transport by wind is a major issue discussed in the aeolian community (Sarre, 1987; Pye and Tsoar, 1990; Anderson et al., 1991; McEwan and Willetts, 1993, 2000; Andreotti et al., 2002a; Nickling and McKenna Neuman, 2009; Zheng, 2009).”
Measurements of the aeolian sand transport saturation length (2008, background): “Dunes result from the interaction between the wind and their shape [Bagnold 1941, Lancaster et al. 1996, Wiggs et al. 1996, McKenna-Neuman et al. 1997, Andreotti et al. 2002 ].”