Journal of applied mechanics
Online ISSN : 1884-832X
Print ISSN : 1345-9139
ISSN-L : 1345-9139
ON RHEOLOGY OF HYPERCONCENTRATED SEDIMENT-LADEN FLOW OVER DUNE TYPE BED IN OPEN CHANNEL
Terunori OHMOTOZhiying CUI
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2005 Volume 8 Pages 855-864

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Abstract
The necessity to understand and predict flows that carry large suspended sediment and wash loads has become acute in the Yellow River Basin where significant erosion and siltation associated with hyperconcentrated flood give rise to many river problems. Mud flows, debris flows or slurries, made up of a large amount of clay and/or silt particles suspended in water, often show non-Newtonian properties but remain poorly understood concerning the impacts of their rheological properties on fully developed turbulent structure.
In this paper, we experimentally investigated the effects of non-Newtonian fluid on the separation vortex over fixed dune type bed by using Particle Image Velocimetry (PIV). The results showed that rheological properties significantly dissipated the turbulent flow fluctuations over the dune bed and augmented the flow resistance by comparison with the clear water flow.
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© by Japan Society of Civil Engineers
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