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Sediment transport over a flat bed in a unidirectional flow: simulations and validation

Heald, J., McEwan, I. and Tait, S. (2004) Sediment transport over a flat bed in a unidirectional flow: simulations and validation. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 362 (1822). pp. 1973-1986. ISSN 1471-2962


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A discrete particle model is described which simulates bedload transport over a flat bed of a unimodal mixed-sized distribution of particles. Simple physical rules are applied to large numbers of discrete sediment grains moving within a unidirectional flow. The modelling assumptions and main algorithms of the bedload transport model are presented and discussed. Sediment particles are represented by smooth spheres, which move under the drag forces of a simulated fluid flow. Bedload mass-transport rates calculated by the model exhibit a low sensitivity to chosen model parameters. Comparisons of the calculated mass-transport rates with well-established empirical relationships are good, strongly suggesting that the discrete particle model has captured the essential elements of the system physics. This performance provides strong justification for future interrogation of the model to investigate details of the small-scale constituent processes which have hitherto been outside the reach of previous experimental and modelling investigations.

Item Type: Article
Copyright, Publisher and Additional Information: © 2004 The Royal Society
Keywords: sediment transport rate, discrete particle model, momentum exchange
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield)
Depositing User: Repository Officer
Date Deposited: 19 Jun 2006
Last Modified: 05 Jun 2014 16:28
Published Version: http://www.journals.royalsoc.ac.uk/openurl.asp?gen...
Status: Published
Publisher: The Royal Society
Refereed: Yes
Identification Number: 10.1098/rsta.2004.1426
URI: http://eprints.whiterose.ac.uk/id/eprint/1314

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