1. RESISTANCE AND FLOW CHARACTERISTICS OF HIGH-CONCENTRATION SEDIMENT LADEN FLOW OVER DUNE TYPE BED IN AN OPEN CHANNEL.
- Author
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HENDRATTA, Liany Amelia and Terunori OHMOTO
- Subjects
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SUSPENDED sediments , *AXIAL loads , *HYDRODYNAMICS , *VELOCIMETRY , *MUDFLOWS , *PREDICTION models , *RHEOLOGY - Abstract
The need to understand and predict flows that carry large loads of suspended sediments and wash loads has become acute in the Yellow River Basin, where significant erosion and siltation associated with high-concentrated floods produce significant erosion, siltation, and associated river problems. Mud flows, debris flows and slurries, which contain large concentrations of clay and/or silt particles suspended in water, often show non-Newtonian hydrodynamic properties. Non-Newtonian flows are poorly understood regarding the impact of their rheological properties on fully developed turbulent flows. In this paper, we experimentally investigated resistance and flow structure of high-concentrated sediment laden flow in an open channel using particle image velocimetry. The results showed that, compared with clear water flow, the rheological properties of sediment-laden flow significantly dissipated the turbulent flow fluctuations over the dune type bed and increased the flow resistance. [ABSTRACT FROM AUTHOR]
- Published
- 2013