Experimental investigation of internal structure of open-channel flow with intense transport of sediment

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Title:Experimental investigation of internal structure of open-channel flow with intense transport of sediment
Creators:
Matoušek, Václav; v dot matousek at fsv dot cvut dot cz; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Bareš, Vojtěch; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Krupička, Jan; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Picek, Tomáš; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Zrostlík, Štěpán; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 4, pp. 318-326
Uncontrolled Keywords:acoustic anemometry, plane bed, solid-liquid flow, tilting flume experiment

Abstract

Gravity-driven open-channel flows carrying coarse sediment over an erodible granular deposit are studied. Results of laboratory experiments with artificial sediments in a rectangular tilting flume are described and analyzed. Besides integral quantities such as flow rate of mixture, transport concentration of sediment and hydraulic gradient, the experiments include measurements of the one-dimensional velocity distribution across the flow. A vertical profile of the longitudinal component of local velocity is measured across the vertical axis of symmetry of a flume cross section using three independent measuring methods. Due to strong flow stratification, the velocity profile covers regions of very different local concentrations of sediment from virtually zero concentration to the maximum concentration of bed packing. The layered character of the flow results in a velocity distribution which tends to be different in the transport layer above the bed and in the sediment-free region between the top of the transport layer and the water surface. Velocity profiles and integral flow quantities are analyzed with the aim of evaluating the layered structure of the flow and identifying interfaces in the flow with a developed transport layer above the upper plane bed.

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

Title:Experimental investigation of internal structure of open-channel flow with intense transport of sediment
Translated title:Experimental investigation of internal structure of open-channel flow with intense transport of sediment
Creators:
Matoušek, Václav; v dot matousek at fsv dot cvut dot cz; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Bareš, Vojtěch; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Krupička, Jan; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Picek, Tomáš; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Zrostlík, Štěpán; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague 6, Czech Republic.
Uncontrolled Keywords:acoustic anemometry, plane bed, solid-liquid flow, tilting flume experiment
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:63
Number:4
Page Range:pp. 318-326
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:8496
Item Type:Article
Deposited On:10 Dec 2015 17:54
Last Modified:10 Dec 2015 16:54

Citation

Matoušek, Václav; Bareš, Vojtěch; Krupička, Jan; Picek, Tomáš; Zrostlík, Štěpán (2015) Experimental investigation of internal structure of open-channel flow with intense transport of sediment. Journal of Hydrology and Hydromechanics, 63 (4). pp. 318-326. ISSN 0042-790X

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