Bed load transport modelling using kinetic theory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00323783" target="_blank" >RIV/68407700:21110/18:00323783 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/e3sconf/20184005072" target="_blank" >http://dx.doi.org/10.1051/e3sconf/20184005072</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/e3sconf/20184005072" target="_blank" >10.1051/e3sconf/20184005072</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Bed load transport modelling using kinetic theory

Popis výsledku v původním jazyce

Intense transport of bed load is associated with highconcentrated sediment-laden flow over a plane mobile bed at high bed shear. Typically, the flow exhibits a layered internal structure in which a vast majority of sediment grains is transported through a collisional layer above the bed. Our investigation focuses on steady uniform 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. In the paper, flow with the internal structure described by linear vertical distributions of granular velocity and concentration across the collisional layer is analyzed by a model based on the classical kinetic theory of granular flows. The model predicts the total discharge, the discharge of sediment, and the flow depth for given (experimentally determined) bed slope and thickness of collisional layer. The model also predicts whether the intefacial dense layer develops between the bed and the collisional layer and how thick it is. Model predictions are compared with results of intense bed-load experiment carried out for lightweight sediment in our laboratory tilting flume.

Název v anglickém jazyce

Bed load transport modelling using kinetic theory

Popis výsledku anglicky

Intense transport of bed load is associated with highconcentrated sediment-laden flow over a plane mobile bed at high bed shear. Typically, the flow exhibits a layered internal structure in which a vast majority of sediment grains is transported through a collisional layer above the bed. Our investigation focuses on steady uniform 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. In the paper, flow with the internal structure described by linear vertical distributions of granular velocity and concentration across the collisional layer is analyzed by a model based on the classical kinetic theory of granular flows. The model predicts the total discharge, the discharge of sediment, and the flow depth for given (experimentally determined) bed slope and thickness of collisional layer. The model also predicts whether the intefacial dense layer develops between the bed and the collisional layer and how thick it is. Model predictions are compared with results of intense bed-load experiment carried out for lightweight sediment in our laboratory tilting flume.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA16-21421S" target="_blank" >GA16-21421S: Analýza stratifikovaného proudění s volnou hladinou založená na kinetické teorii zrnitých směsí</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proseeding of River Flow 2018 - Ninth International Conference on Fluvial Hydraulics

ISBN

—

ISSN

2267-1242

e-ISSN

2267-1242

Počet stran výsledku

8

Strana od-do

—

Název nakladatele

EDP Sciences

Místo vydání

Les Ulis

Místo konání akce

Lyon-Villeurbanne

Datum konání akce

5. 9. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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