Estimating the Local Turbulent Energy Dissipation Rate Using 2-D PIV Measurements and a 1-D Energy Spectrum Function

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00230585" target="_blank" >RIV/68407700:21220/15:00230585 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1134/S004057951502013X" target="_blank" >http://dx.doi.org/10.1134/S004057951502013X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1134/S004057951502013X" target="_blank" >10.1134/S004057951502013X</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Estimating the Local Turbulent Energy Dissipation Rate Using 2-D PIV Measurements and a 1-D Energy Spectrum Function

Popis výsledku v původním jazyce

A simple method for estimating the local turbulent energy dissipation rate for a non-isotropic state is proposed. The proposed method is based on an estimation of the isotropic dissipation rate under the assump- tion of local isotropy, which is subsequently corrected for the actual conditions. The level of anisotropy is char- acterized by the fluctuation velocity components. The isotropic dissipation rates are obtained by energy spec- trum function fitting. A data block averaging technique is used to smooth the spectrum. The effect of the data number within block on the calculated turbulent energy dissipation rate is taken into account. The proposed method has been tested on data obtained by a 2-D time-resolved PIV method. The effect of the spatial resolution of PIV on the estimation of the dissipation rate is also taken into account, using the correction proposed by Delafosse et al. (2011). The estimate of the local turbulent energy dissipation was found to be the same irre- spective

Název v anglickém jazyce

Estimating the Local Turbulent Energy Dissipation Rate Using 2-D PIV Measurements and a 1-D Energy Spectrum Function

Popis výsledku anglicky

A simple method for estimating the local turbulent energy dissipation rate for a non-isotropic state is proposed. The proposed method is based on an estimation of the isotropic dissipation rate under the assump- tion of local isotropy, which is subsequently corrected for the actual conditions. The level of anisotropy is char- acterized by the fluctuation velocity components. The isotropic dissipation rates are obtained by energy spec- trum function fitting. A data block averaging technique is used to smooth the spectrum. The effect of the data number within block on the calculated turbulent energy dissipation rate is taken into account. The proposed method has been tested on data obtained by a 2-D time-resolved PIV method. The effect of the spatial resolution of PIV on the estimation of the dissipation rate is also taken into account, using the correction proposed by Delafosse et al. (2011). The estimate of the local turbulent energy dissipation was found to be the same irre- spective

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/GAP101%2F12%2F2274" target="_blank" >GAP101/12/2274: Lokální rychlost disipace turbulentní energie v míchaných reaktorech & bioreaktorech</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Theoretical Foundations of Chemical Engineering

ISSN

0040-5795

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

RU - Ruská federace

Počet stran výsledku

12

Strana od-do

145-156

Kód UT WoS článku

000352910900003

EID výsledku v databázi Scopus

2-s2.0-84938243356