Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You and Your Team.

Learn More →

Criteria for the instability of upper‐stage plane beds

Criteria for the instability of upper‐stage plane beds ABSTRACT Calculations of the critical dimensionless bed stresses that obtain when upper‐stage plane beds should revert to ripple and dune bed forms are presented. Strong support is given to the Bagnold ‘universal’ plane‐bed instability criterion and to a modified criterion suggested by Allen over a wide range of solids grain size. A reinterpretation of the mechanism of plane bed instability is based upon the extent to which significant grain concentrations in plane bed flows increase apparent fluid viscosity and decrease turbulence production over potential bed defects, thereby preventing ripple or dune propagation and growth. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Sedimentology Wiley

Criteria for the instability of upper‐stage plane beds

Sedimentology , Volume 27 (2) – Apr 1, 1980

Loading next page...
 
/lp/wiley/criteria-for-the-instability-of-upper-stage-plane-beds-17uZHE31qd
Publisher
Wiley
Copyright
Copyright © 1980 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0037-0746
eISSN
1365-3091
DOI
10.1111/j.1365-3091.1980.tb01171.x
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT Calculations of the critical dimensionless bed stresses that obtain when upper‐stage plane beds should revert to ripple and dune bed forms are presented. Strong support is given to the Bagnold ‘universal’ plane‐bed instability criterion and to a modified criterion suggested by Allen over a wide range of solids grain size. A reinterpretation of the mechanism of plane bed instability is based upon the extent to which significant grain concentrations in plane bed flows increase apparent fluid viscosity and decrease turbulence production over potential bed defects, thereby preventing ripple or dune propagation and growth.

Journal

SedimentologyWiley

Published: Apr 1, 1980

References