Journal ArticleDOI
Sediment transport; Part I, Bed load transport
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In this article, a method is presented which enables the computation of the bed-load transport as the product of the saltation height, the particle velocity and the bed load concentration.Abstract:
A method is presented which enables the computation of the bed-load transport as the product of the saltation height, the particle velocity and the bed-load concentration. The equations of motions for a solitary particle are solved numerically to determine the saltation height and particle velocity. Experiments with gravel particles (transported as bed load) are selected to calibrate the mathematical model using the lift coefficient as a free parameter. The model is used to compute the saltation heights and lengths for a range of flow conditions. The computational results are used to determine simple relationships for the saltation characteristics. Measured transport rates of the bed load are used to compute the sediment concentration in the bed-load layer. A simple expression specifying the bed-load concentration as a function of the flow and sediment conditions is proposed. A verification analysis using about 600 (alternative) data shows that about 77% of the predicted bed-load-transport rates are within 0.5 and 2 times the observed values.read more
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Journal ArticleDOI
Sediment Transport, Part III: Bed Forms and Alluvial Roughness
TL;DR: In this paper, a verification analysis using about 1,500 (alternative) reliable flume and field data shows good results in predicting the hydraulic roughness (friction factor).
Journal ArticleDOI
Unified view of sediment transport by currents and waves. I: Initiation of motion, bed roughness, and bed-load transport
TL;DR: In this paper, the effect of fine silt on the bed composition and on initiation of motion (critical conditions) of sediment beds over the full range of conditions (silts to gravel) is discussed.
Journal Article
Closure of "Sediment Transport, Part III: Bed Forms and Alluvial Roughness"
Journal ArticleDOI
Reanalysis and Correction of Bed-Load Relation of Meyer-Peter and Müller Using Their Own Database
Miguel Wong,Gary Parker +1 more
TL;DR: In this paper, an improved correction of the boundary shear stress due to sidewall effects has been proposed, which is the most parsimonious form of the bed-load relation of Meyer-Peter and Muller that is dictated by their own data set.
MonographDOI
Mechanics of Sediment Transport
Ning Chien,Zhaohui Wan +1 more
TL;DR: In this paper, the authors present a synthesis of information gleaned from more than 800 papers spanning the fields of hydraulic engineering, mathematics, physics, geology, rheology and chemistry, giving the reader a profound understanding of the present status and direction of the industry's research efforts.
References
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Journal ArticleDOI
The lift on a small sphere in a slow shear flow
TL;DR: In this article, it was shown that a sphere moving through a very viscous liquid with velocity V relative to a uniform simple shear, the translation velocity being parallel to the streamlines and measured relative to streamline through the centre, experiences a lift force 81·2μVa2k½/v½ + smaller terms perpendicular to the flow direction, which acts to deflect the particle towards the streamline moving in the direction opposite to V.
Journal ArticleDOI
Experiments on a Gravity-Free Dispersion of Large Solid Spheres in a Newtonian Fluid under Shear
TL;DR: In this article, a large number of spherical grains of diameter D = 0.13 cm were sheared in Newtonian fluids of varying viscosity (water and a glycerine-water-alcohol mixture) in the annular space between two concentric drums.
Journal ArticleDOI
An investigation of particle trajectories in two-phase flow systems
S. A. Morsi,A. J. Alexander +1 more
TL;DR: In this article, the authors describe a theoretical investigation into the response of a spherical particle to a one-dimensional fluid flow, and the motion of the spherical particle in a uniform 2D fluid flow about a circular cylinder.
Formulas for Bed-Load transport
E. Meyer-Peter,R. Müller +1 more
TL;DR: In this article, an attempt is made to derive an empirical law of bed-load transport based on recent experimental data and the results and interpretation of tests already made known in former publications of the Laboratory for Hydraulic Research and Soil Mechanics at the Federal Institute of Technology, Zurich.