The Minimum Recording Time for PIV Measurements in a Vessel Agitated by a High-Shear Tooth Impeller

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F20%3A00008632" target="_blank" >RIV/46747885:24620/20:00008632 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985874:_____/20:00524052 RIV/68407700:21220/20:00341212

Výsledek na webu

<a href="https://link.springer.com/content/pdf/10.1134/S0015462820020123.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1134/S0015462820020123.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S0015462820020123" target="_blank" >10.1134/S0015462820020123</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Minimum Recording Time for PIV Measurements in a Vessel Agitated by a High-Shear Tooth Impeller

Popis výsledku v původním jazyce

The flow field in a mechanically agitated vessel has often been investigated by Particle Image Velocimetry (PIV). In published studies, the recording time ranges between tenths of seconds and units of seconds. The question arises: What is the minimum recording time that is needed to obtain relevant data? Our study was aimed at determining the minimum recording time that is required to get consistent velocity field results, using the PIV technique, in a vessel agitated by a high-shear tooth impeller within the impeller flow discharge zone. Our results help to adjust PIV experimental conditions that guarantee correct velocity data. The tests were performed in a fully-baffled cylindrical flat-bottom vessel 400 mm in inner diameter agitated by a tooth impeller 133 mm in diameter, with three different liquids, using 2-D Time-Resolved PIV in the impeller Reynolds number range from 68 000 to 221 000. A statistical analysis of the radial and axial components of the mean and fluctuation velocities measured in the impeller discharge flow showed that the dimensionless minimum recording time is independent of the impeller Reynolds number. The value is N.tRmin = 62 for the mean radial velocity and fluctuation velocities in both the radial direction and the axial direction, while a longer measuring time, N.tRmin = 174, is required to obtain the consistent mean axial velocity for ±2% volatility. The dimensionless criterion N.tRmin = const is recommended as the scale-up rule for an estimate of the minimum recording time.

Název v anglickém jazyce

The Minimum Recording Time for PIV Measurements in a Vessel Agitated by a High-Shear Tooth Impeller

Popis výsledku anglicky

The flow field in a mechanically agitated vessel has often been investigated by Particle Image Velocimetry (PIV). In published studies, the recording time ranges between tenths of seconds and units of seconds. The question arises: What is the minimum recording time that is needed to obtain relevant data? Our study was aimed at determining the minimum recording time that is required to get consistent velocity field results, using the PIV technique, in a vessel agitated by a high-shear tooth impeller within the impeller flow discharge zone. Our results help to adjust PIV experimental conditions that guarantee correct velocity data. The tests were performed in a fully-baffled cylindrical flat-bottom vessel 400 mm in inner diameter agitated by a tooth impeller 133 mm in diameter, with three different liquids, using 2-D Time-Resolved PIV in the impeller Reynolds number range from 68 000 to 221 000. A statistical analysis of the radial and axial components of the mean and fluctuation velocities measured in the impeller discharge flow showed that the dimensionless minimum recording time is independent of the impeller Reynolds number. The value is N.tRmin = 62 for the mean radial velocity and fluctuation velocities in both the radial direction and the axial direction, while a longer measuring time, N.tRmin = 174, is required to obtain the consistent mean axial velocity for ±2% volatility. The dimensionless criterion N.tRmin = const is recommended as the scale-up rule for an estimate of the minimum recording time.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21100 - Other engineering and technologies

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Fluid Dynamics

ISSN

0015-4628

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

231-240

Kód UT WoS článku

000526810400010

EID výsledku v databázi Scopus

2-s2.0-85083455302