Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/46354
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Type: Journal article
Title: The orientation of helical flow in curved channels
Author: Corney, R.
Peakall, J.
Parsons, D.
Elliott, L.
Amos, K.
Best, J.
Keevil, G.
Ingham, D.
Citation: Sedimentology, 2006; 53(2):249-257
Publisher: Blackwell Publishing Ltd
Issue Date: 2006
ISSN: 0037-0746
1365-3091
Statement of
Responsibility: 
Ransome K. T. Corney, Jeffrey Peakall, Daniel R. Parsons, Lionel Elliott, Kathryn J. Amos, James L. Best, Gareth M. Keevil And Derek B. Ingham
Abstract: The planform patterns of meandering submarine channels and subaerial fluvial bends show many similarities that have given rise to strong analogies concerning the fluid dynamics of these channel types. Existing models of helical motion in open-channel bends depict flow that is characterized by surface flow towards the outer bank, and basal flow towards the inner bank. This paper investigates and compares, through an analytical model and physical experiment, flows within fluvial meanders, and submarine channel bends that contain density-driven gravity currents. The results indicate that the sense of helical motion can be reversed in submarine bends that contain density currents when compared with fluvial bends, and that the orientation of the helical flow is dependent on the vertical distribution of downstream velocity. Specifically, the sense of helical motion is reversed in bends when the maximum downstream velocity is near the bed, resulting in near-bed flow towards the outer bank. These findings suggest that the dynamics of sediment transport and deposition in curved channels with such velocity profiles will be fundamentally different to those currently assumed from sinuous openchannels. © 2006 The Authors. Journal compilation 2006 International Association of Sedimentologist.
Keywords: Bends
flow
helical flow
submarine channel
Description: © 2008 International Association of Sedimentologists The definitive version may be found at www.wiley.com
DOI: 10.1111/j.1365-3091.2006.00771
Published version: http://www3.interscience.wiley.com/journal/118595383/abstract
Appears in Collections:Aurora harvest 6
Australian School of Petroleum publications

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