Erosion of plane bed by sand slurry current in pipe

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Title:Erosion of plane bed by sand slurry current in pipe
Creators:
Matoušek, Václav; v dot matousek at wbmt dot tudelft dot nl; Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 52, 3, pp. 156-161
Uncontrolled Keywords:Pick-up, Hindered Erosion, Suspension Flow, Bed Friction

Abstract

If a sand slurry current flows over a plane bed the thickness of the bed remains constant providing that equilibrium is established between the vertical fluxes that govern the exchange of particles between the slurry current and the sand bed. These solids fluxes are the settling flux and the erosion (pick-up) flux through the top of the bed. In the literature, relations to quantify the erosion flux from a sand bed consider the water current above an erodible bed. The effect of the presence of solid particles in the current is not taken into account. However, it has been observed that the presence of solid particles tends to suppress pick-up. This phenomenon is called hindered erosion. At present, the knowledge of the process of hindered pick-up is very limited although it is suspected that the hindered pick-up plays an important role in many practical situations. The paper discusses the results of the plane-bed test recently carried out in a 150-mm pipe of the Laboratory of Dredging Engineering of Delft University of Technology. Measurements of the thickness of the bed, the concentration profiles in the pipe cross section, the mean velocity, and the pressure drop allowed us to evaluate the conditions governing the vertical exchange of solids at the top of the stationary bed for currents of different solids concentrations.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Erosion of plane bed by sand slurry current in pipe
Translated title:Eroze pískového lože proudem hydrosměsi v potrubí
Creators:
Matoušek, Václav; v dot matousek at wbmt dot tudelft dot nl; Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
Uncontrolled Keywords:Pick-up, Hindered Erosion, Suspension Flow, Bed Friction
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:52
Number:3
Page Range:pp. 156-161
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:5981
Item Type:Article
Deposited On:15 Jun 2010 12:14
Last Modified:15 Jun 2010 10:14

Citation

Matoušek, Václav (2004) Erosion of plane bed by sand slurry current in pipe. Journal of Hydrology and Hydromechanics, 52 (3). pp. 156-161. ISSN 0042-790X

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