Collisional transport model for intense bed load
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00336235" target="_blank" >RIV/68407700:21110/20:00336235 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.2478/johh-2019-0027" target="_blank" >https://doi.org/10.2478/johh-2019-0027</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2478/johh-2019-0027" target="_blank" >10.2478/johh-2019-0027</a>
Alternative languages
Result language
angličtina
Original language name
Collisional transport model for intense bed load
Original language description
In an open channel with a mobile bed, intense transport of bed load is associated with high-concentrated sediment-laden flow over a plane surface of the eroded bed due to high bed shear. Typically, the flow exhibits a layered internal structure in which virtually all sediment grains are transported through a collisional layer above the bed. Our investigation focuses on steady uniform turbulent open-channel flow with a developed collisional transport layer and combines modelling and experiment to relate integral quantities, as the discharge of solids, discharge of mixture, and flow depth with the longitudinal slope of the bed and the internal structure of the flow above the bed. A transport model is presented which considers flow with the internal structure described by linear vertical distributions of granular velocity and concentration across the collisional layer. The model employs constitutive relations based on the classical kinetic theory of granular flows selected by our previous experimental testing as appropriate for the flow and transport conditions under consideration. For given slope and depth of the flow, the model predicts the total discharge and the discharge of sediment. The model also predicts the layered structure of the flow, giving the thickness of the dense layer, collisional layer, and water layer. Model predictions are compared with results of intense bed-load experiment carried out for lightweight sediment in our laboratory tilting flume.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
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)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hydrology and Hydromechanics
ISSN
0042-790X
e-ISSN
1338-4333
Volume of the periodical
68
Issue of the periodical within the volume
1
Country of publishing house
SK - SLOVAKIA
Number of pages
10
Pages from-to
60-69
UT code for WoS article
000514680600007
EID of the result in the Scopus database
2-s2.0-85082030896