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%2F61388998%3A_____%2F11%3A00363538" target="_blank" >RIV/61388998:_____/11:00363538 - 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

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

Popis výsledku v původním jazyce

2-dimensional PIV measurement is performed in wind-channel with model of street canyons. Two geometries - flat and pitched roof - are tested in terms of flow dynamics. Velocity vector fields in vertical planes within canyons are analysed by Quadrant technique, Wavelet analysis and Proper Orthogonal Decomposition (POD). Wavelet analysis with Morlet function is applied on velocity data. Physical interpretation was done with help of PIV records. Most energetic events in the flow can be assigned to the sweep and ejection events. Vortices are not rare, however they do not bring energy in a quasi-periodic manner to be nicely detected by Morlet wavelet. POD is applied either on velocity data either on vorticity field. Rather a significant distinction betweendynamics above two shapes of roof is found out.

Název v anglickém jazyce

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

Popis výsledku anglicky

2-dimensional PIV measurement is performed in wind-channel with model of street canyons. Two geometries - flat and pitched roof - are tested in terms of flow dynamics. Velocity vector fields in vertical planes within canyons are analysed by Quadrant technique, Wavelet analysis and Proper Orthogonal Decomposition (POD). Wavelet analysis with Morlet function is applied on velocity data. Physical interpretation was done with help of PIV records. Most energetic events in the flow can be assigned to the sweep and ejection events. Vortices are not rare, however they do not bring energy in a quasi-periodic manner to be nicely detected by Morlet wavelet. POD is applied either on velocity data either on vorticity field. Rather a significant distinction betweendynamics above two shapes of roof is found out.

Druh

D - Stať ve sborníku

CEP obor

DG - Vědy o atmosféře, meteorologie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název statě ve sborníku

13th International Conference on Wind Engineerin

ISBN

978-1-907132-33-9

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

Multi-Science Publishing Co Ltd

Místo vydání

Amsterdam

Místo konání akce

Amsterdam

Datum konání akce

10. 7. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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