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On the development of dunes in erodible channels

Published online by Cambridge University Press:  29 March 2006

Jørgen Fredsøe
Jørgen Fredsøe
Affiliation:
Institute of Hydrodynamics and Hydraulic Engineering, Technical University of Denmark, DK 2800 Lyngby/Copenhagen
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Abstract

A two-dimensional stability analysis of the flow in a straight alluvial channel has been carried out, using the vorticity transport equation. In the analysis an attempt has been made to account for the influence of gravity on bed-load transport, and this turned out to change the stability quite significantly.

In the case of instability, the further growth of the dunes has been investigated using a second-order approximation, This nonlinear theory explains the experimental fact that the dunes very soon become asymmetric.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 64 , Issue 1 , 3 June 1974 , pp. 1 - 16
Copyright
© 1974 Cambridge University Press

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