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Sand Ripples and Dunes

Charru, François and Andreotti, Bruno and Claudin, Philippe Sand Ripples and Dunes. (2013) Annual Review of Fluid Mechanics, 45. 469-493. ISSN 0066-4189

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Official URL: http://dx.doi.org/10.1146/annurev-fluid-011212-140806

Abstract

An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms grow. This review discusses the following issues, in light of the recent literature: What are the relevant dynamical mechanisms controlling the emergence of bed forms? Do they form by linear instability or nonlinear processes such as pattern coarsening? What determines their timescales and length scales, so different in air and water? What are the similarities and differences between aeolian and subaqueous patterns? What is the influence of the mode of transport: bed load, saltation, or suspension? Can bed forms emerge under any hydrodynamical regime, laminar and turbulent? Guided by these questions, we propose a unified description of bed-form growth and saturation, emphasizing the hydrodynamical regime in the inner layer and the relaxation phenomena associated with particle transport

Item Type:Article
Additional Information:Editor policy : author cannot archive postprints. The original document is avalaible at : http://www.annualreviews.org/doi/full/10.1146/annurev-fluid-011212-140806
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université de Paris Diderot - Paris 7 (FRANCE)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Ecole supérieure de physique et de chimie industrielles ParisTech - ESPCI (FRANCE)
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Deposited By: Francois CHARRU
Deposited On:04 Mar 2013 16:48

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