PIV measurement of turbulent flow within a street canyon: Detection of coherent motion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10132818" target="_blank" >RIV/00216208:11320/12:10132818 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388998:_____/12:00376552

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0167610512000414" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0167610512000414</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jweia.2012.02.017" target="_blank" >10.1016/j.jweia.2012.02.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

PIV measurement of turbulent flow within a street canyon: Detection of coherent motion

Popis výsledku v původním jazyce

Turbulent flow inside a street canyon was investigated in a wind-channel. Velocity measurements were performed in vertical planes by means of particle image velocimetry (PIV) at the repetition rate 500 Hz. Two geometries were used for comparison purposes: buildings with pitched roofs and with flat roofs. Both induce different dynamic regimes in the street, so that the generated turbulent flows are of different categories. Velocity data were analysed by proper orthogonal decomposition (POD). POD identifies the most dominant modes with high coherency in the flow and also evaluates the relative contributions of each mode to the overall kinetic energy of turbulence. Rigorous analysis of correctness of the physical interpretation of such decomposition was carried out. POD reconstruction of the original vector field was performed and the accuracy of the method was evaluated. Wavelet analysis was applied to the time-series of the POD expansion coefficients in order to reveal the dynamics of t

Název v anglickém jazyce

PIV measurement of turbulent flow within a street canyon: Detection of coherent motion

Popis výsledku anglicky

Turbulent flow inside a street canyon was investigated in a wind-channel. Velocity measurements were performed in vertical planes by means of particle image velocimetry (PIV) at the repetition rate 500 Hz. Two geometries were used for comparison purposes: buildings with pitched roofs and with flat roofs. Both induce different dynamic regimes in the street, so that the generated turbulent flows are of different categories. Velocity data were analysed by proper orthogonal decomposition (POD). POD identifies the most dominant modes with high coherency in the flow and also evaluates the relative contributions of each mode to the overall kinetic energy of turbulence. Rigorous analysis of correctness of the physical interpretation of such decomposition was carried out. POD reconstruction of the original vector field was performed and the accuracy of the method was evaluated. Wavelet analysis was applied to the time-series of the POD expansion coefficients in order to reveal the dynamics of t

Druh

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

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Journal of Wind Engineering and Industrial Aerodynamics

ISSN

0167-6105

e-ISSN

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Svazek periodika

2012

Číslo periodika v rámci svazku

104-106

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

302-313

Kód UT WoS článku

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EID výsledku v databázi Scopus

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