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- W39260265 abstract "ABSTRACT Many studies show that suspended sediment may substantially affect the turbulence characteristics of the carrier fluid in sediment-laden flows. This effect should be taken into account when modeling such flows, which is not usually done due to the incomplete knowledge of this interdependence. Another conventional modeling simplification is based on the assumption that fluid and particles have the same hydrodynamic characteristics. Recent experimental evidence shows that this assumption is not accurate. However, the available results describing separately the two-phases in the flow are scarce and often inconsistent to appropriately substantiate this statement. This paper presents some preliminary results of investigations on water and suspended sediment turbulence characteristics in an open-channel flow addressing these important modeling issue. Two kinds of sediment were used in the investigations. Results obtained with crushed walnut shell with relative density of 1.3 and particle diameter ranging from 0.590 mm to 0.710 mm are only presented here. The fluid phase in the mixture was traced with spherical glass particles with a diameter of 0.040 mm. Velocities for particles and water were measured, simultaneously, using Particle Tracking Velocimetry (PTV). Phase separation was made using the size of the particles as phase-discrimination criterion. A self-adaptive, iterative, procedure for discarding the erroneous measurements introduced by the PTV technique was developed. For the experimental conditions investigated, the stream wise and vertical turbulence intensities of the water were enhanced by the addition of the sediment. The comparison between water and sediment turbulence intensities shows that the particle turbulence intensities are lower than those for water, both in the streamwise and vertical directions." @default.
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- W39260265 date "2002-01-01" @default.
- W39260265 modified "2023-09-27" @default.
- W39260265 title "EXPERIMENTAL STUDY ON LIQUID AND SUSPENDED SEDIMENT TURBULENCE CHARACTERISTICS IN OPEN-CHANNEL FLOWS" @default.
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- W39260265 doi "https://doi.org/10.1016/b978-008044114-6/50094-6" @default.
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