Vertical suspended sediment diffusivity for uniform currents

Vertical diffusivity of suspended sediment with wide size distribution is concerned. The sediment size is expressed by ϕ scale, and the ϕ values are assumed to be normally distributed. The suspended sediment concentration is divided into two groups, 2% of fine side, and 98% of the rest, and single r...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2013, 17(6), , pp.1496-1501
Main Authors: Kim, Hyoseob, Jang, Changhwan
Format: Article
Language:English
Subjects:
Civil Engineering
Computational fluid dynamics
Diffusion coefficient
Diffusion coefficients
Diffusivity
Eddy viscosity
Engineering
Equations
Fluid flow
Fluids
Geotechnical Engineering & Applied Earth Sciences
Industrial Pollution Prevention
Mathematical analysis
Sediment
Sediment concentration
Sediments
Settling
Settling rate
Settling velocity
Size distribution
Suspended sediments
Vertical distribution
Water Engineering
토목공학
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Summary:Vertical diffusivity of suspended sediment with wide size distribution is concerned. The sediment size is expressed by ϕ scale, and the ϕ values are assumed to be normally distributed. The suspended sediment concentration is divided into two groups, 2% of fine side, and 98% of the rest, and single representative settling velocity for median size is used to calculate the vertical diffusion coefficient of the suspended sediment. The computed distribution of the vertical sediment diffusion coefficient is larger than the distribution of the vertical fluid eddy viscosity. A set of equations is proposed for description of the distribution of the vertical suspended sediment diffusion coefficient for engineering purposes. The new equation improves correlation with a set of measured diffusion coefficient values by Barton and Lin.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-013-0163-x