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

Title:

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

Creator:

Matoušek, Václav, Bareš, Vojtěch, Krupička, Jan, Picek, Tomáš, and Zrostlík, Štěpán

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b7ddeb20-e96e-4b7a-8b59-626c79229416
uuid:b7ddeb20-e96e-4b7a-8b59-626c79229416
doi:10.1515/johh-2015-0035

Subject:

acoustic anemometry, plane bed, solid-liquid flow, and tilting flume experiment

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

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.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

318-326

Source:

Journal of hydrology and hydromechanics | 2015 Volume:63 | Number:4

Harvested from:

CDK

Metadata only:

false