Structure of flow with intense bed load layer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00301956" target="_blank" >RIV/68407700:21110/16:00301956 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structure of flow with intense bed load layer

Popis výsledku v původním jazyce

Experimental results are discussed of steady uniform turbulent open channel flows over inclined granular beds in the upper-stage plane bed regime. The layered structure of the flow is described, the layer interfaces identi-fied, and the flow behavior in the layers evaluated using laboratory measurements including velocity distribu-tion across the flow depth. Special attention is paid to the transport layer through which a vast majority of bed load is transported. It is composed of the collisional part (sediment grains supported by mutual collisions) and the dense part (moving grains in permanent contact). The distribution of velocity is approximately linear in the collisional layer and the position of the origin of the linear profile is sensitive to dimensionless bed shear stress. The local concentration at the bottom of the collisional layer is sensitive to the bed shear stress as well. Above a certain value of the dimensionless bed shear stress, stability of the transport layer seems to be associated with a constant value of Richardson number.

Název v anglickém jazyce

Structure of flow with intense bed load layer

Popis výsledku anglicky

Experimental results are discussed of steady uniform turbulent open channel flows over inclined granular beds in the upper-stage plane bed regime. The layered structure of the flow is described, the layer interfaces identi-fied, and the flow behavior in the layers evaluated using laboratory measurements including velocity distribu-tion across the flow depth. Special attention is paid to the transport layer through which a vast majority of bed load is transported. It is composed of the collisional part (sediment grains supported by mutual collisions) and the dense part (moving grains in permanent contact). The distribution of velocity is approximately linear in the collisional layer and the position of the origin of the linear profile is sensitive to dimensionless bed shear stress. The local concentration at the bottom of the collisional layer is sensitive to the bed shear stress as well. Above a certain value of the dimensionless bed shear stress, stability of the transport layer seems to be associated with a constant value of Richardson number.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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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

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

River Flow 2016

ISBN

978-1-138-02913-2

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

365-366

Název nakladatele

CRC Press/Balkema

Místo vydání

Leiden

Místo konání akce

St. Louis

Datum konání akce

11. 7. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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