Local velocity measurements in gravity-driven flows with intense bedload of coarse particles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00311231" target="_blank" >RIV/68407700:21110/16:00311231 - 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

Local velocity measurements in gravity-driven flows with intense bedload of coarse particles

Popis výsledku v původním jazyce

A broad dataset of sheet-flow experiments with granular material under steady and uniform conditions is presented in this paper with the focus on measurements of streamwise velocity component. Three different lightweight sediment fractions were used in total number of 128 experimental runs in wide range of sheet-flow modes which are being represented by dimensionless Shields parameter from 0.3 up to 2.3. The velocity information is obtained using three independent methods: Prandtl probe (PT), Ultrasonic Velocity Profiler (UVP) and Acoustic Doppler Velocity Profiler (ADVP). The measurement methods are compared to each other by means of their limitations and provided results in absolute and dimensionless velocity magnitudes. The results are consistent for all experimental runs and are further used for description of flow internal structure. The capability of individual measuring methods is demonstrated here on linear velocity distribution model in the transport layer with varying thickness of basal sublayer on the boundary of stationary bed and transport layer

Název v anglickém jazyce

Local velocity measurements in gravity-driven flows with intense bedload of coarse particles

Popis výsledku anglicky

A broad dataset of sheet-flow experiments with granular material under steady and uniform conditions is presented in this paper with the focus on measurements of streamwise velocity component. Three different lightweight sediment fractions were used in total number of 128 experimental runs in wide range of sheet-flow modes which are being represented by dimensionless Shields parameter from 0.3 up to 2.3. The velocity information is obtained using three independent methods: Prandtl probe (PT), Ultrasonic Velocity Profiler (UVP) and Acoustic Doppler Velocity Profiler (ADVP). The measurement methods are compared to each other by means of their limitations and provided results in absolute and dimensionless velocity magnitudes. The results are consistent for all experimental runs and are further used for description of flow internal structure. The capability of individual measuring methods is demonstrated here on linear velocity distribution model in the transport layer with varying thickness of basal sublayer on the boundary of stationary bed and transport layer

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

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