THRESHOLDS OF UPPER-STAGE PLANE BED REGIME FOR INTENSE BED LOAD IN OPEN CHANNEL

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00300569" target="_blank" >RIV/68407700:21110/16:00300569 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.14311/CEJ.2016.02.0006" target="_blank" >http://dx.doi.org/10.14311/CEJ.2016.02.0006</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/CEJ.2016.02.0006" target="_blank" >10.14311/CEJ.2016.02.0006</a>

Result language

angličtina

Original language name

THRESHOLDS OF UPPER-STAGE PLANE BED REGIME FOR INTENSE BED LOAD IN OPEN CHANNEL

Original language description

Results are discussed of laboratory experiments on criteria determining the transition between the regime of dunes and the upper stage plane bed (UPB) regime and the transition between the UPB regime and the regime of wavy flow. The experiments were carried for 3 fractions of plastic material and two fractions of glass beads in a broad range of flow conditions (different discharges of water and solids and longitudinal bed slopes) in a tilting flume. The experiments reveal that, contrary to expectations, a constant value of the Shields parameter is not an appropriate criterion for the transition between the dune regime and the UPB regime. Instead, the criterion seems to be well represented by a constant value of the longitudinal bed slope. The transition between the UPB regime and the wavy regime is found at a constant value of the densimetric Froude number. Relatively high values of Froude number at the threshold are due primarily to the presence of the collisional transport layer which protects the bed from an influence of undulating water surface.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JN - Civil engineering

OECD FORD branch

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Project

<a href="/en/project/GA16-21421S" target="_blank" >GA16-21421S: Analysis of Granular-Liquid Channel Flows based on Kinetic Theory Approach</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

The Civil Engineering Journal

ISSN

1805-2576

e-ISSN

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Volume of the periodical

2

Issue of the periodical within the volume

7

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

1-8

UT code for WoS article

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EID of the result in the Scopus database

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