Modelling of Solids Distribution in Sediment Laden Open Channel Flow: Laboratory Validation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F22%3A00358371" target="_blank" >RIV/68407700:21110/22:00358371 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3850/IAHR-39WC2521711920221037" target="_blank" >http://dx.doi.org/10.3850/IAHR-39WC2521711920221037</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3850/IAHR-39WC2521711920221037" target="_blank" >10.3850/IAHR-39WC2521711920221037</a>
Alternative languages
Result language
angličtina
Original language name
Modelling of Solids Distribution in Sediment Laden Open Channel Flow: Laboratory Validation
Original language description
Steady uniform open-channel flow with intense transport of combined load (suspended load and contact load) above plane mobile bed is modelled using a new developed transport model based on the kinetic theory of granular flow. The model is an extension of the recently developed model for collisional transport and the new model employs the mixing-length concept to incorporate a contribution of flow turbulence in supporting transported sediment particles additional to the dominating support contribution by interparticle contacts. The model predicts flow rates of water and sediment for a given combination of the channel depth and longitudinal slope and includes predictions of the solids distribution and flow velocity across the flow depth. Validation experiments with lightweight sediment in a laboratory tilting flume provide results for a comparison with new model predictions. The experiments include measurements of the distribution of the local sediment concentration using the camera-based laser stripe technique and measurements of the distribution of velocity of solids using the imaging technique based on Particle Tracking Velocimetry with two synchronized high-speed cameras. Furthermore, local velocities of water are obtained from Pitot-tube measurements. The paper presents results of the transport model and their comparison with results of the laboratory experiment for a relatively broad range of bed shear conditions (Shields parameter between 0.8 and 1.8 approximately). A discussion includes criteria and conditions for the local support of particles by turbulent eddies in the transport layer of the flow transporting combined load.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA19-18411S" target="_blank" >GA19-18411S: Modelling of intense collisional sediment transport with turbulent suspension</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 39th IAHR World Congress
ISBN
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ISSN
2521-7119
e-ISSN
2521-7119
Number of pages
8
Pages from-to
616-623
Publisher name
Universidad de Granada
Place of publication
Granada
Event location
Granada, Spain
Event date
Jun 19, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001070410600112