On local velocity measurement in gravity-driven flows with intense bedload of coarse lightweight particles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00301953" target="_blank" >RIV/68407700:21110/16:00301953 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.flowmeasinst.2016.06.023" target="_blank" >http://dx.doi.org/10.1016/j.flowmeasinst.2016.06.023</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.flowmeasinst.2016.06.023" target="_blank" >10.1016/j.flowmeasinst.2016.06.023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On local velocity measurement in gravity-driven flows with intense bedload of coarse lightweight 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 during 128 experimental runs across a wide range of sheet-flow modes which were represented by dimensionless Shields parameter from 0.3 up to 2.3. The local velocity information was obtained using three independent methods: Prandtl probe (PT), Ultrasonic Velocity Profiler (UVP) and Acoustic Doppler Velocity Profiler (ADVP). The measurement methods were compared to each other using results in absolute and dimensionless velocity magnitudes. Limitations of the methods are discussed. The results were consistent for all experimental runs and are further used for a description of the observed flow internal structure. The capability of individual measuring methods is demonstrated here on an identification of a transport layer of a linear velocity distribution and of a basal sublayer at the transition between the stationary bed and the transport layer.

Název v anglickém jazyce

On local velocity measurement in gravity-driven flows with intense bedload of coarse lightweight 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 during 128 experimental runs across a wide range of sheet-flow modes which were represented by dimensionless Shields parameter from 0.3 up to 2.3. The local velocity information was obtained using three independent methods: Prandtl probe (PT), Ultrasonic Velocity Profiler (UVP) and Acoustic Doppler Velocity Profiler (ADVP). The measurement methods were compared to each other using results in absolute and dimensionless velocity magnitudes. Limitations of the methods are discussed. The results were consistent for all experimental runs and are further used for a description of the observed flow internal structure. The capability of individual measuring methods is demonstrated here on an identification of a transport layer of a linear velocity distribution and of a basal sublayer at the transition between the stationary bed and the transport layer.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

—

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 periodika

Flow Measurement and Instrumentation

ISSN

0955-5986

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

68-78

Kód UT WoS článku

000386318000008

EID výsledku v databázi Scopus

2-s2.0-84984876238