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

SYSNO ASEP	0363538
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	PIV measurement of turbulent flow within a street canyon: detection of coherent motion
Author(s)	Kellnerová, Radka (UT-L)_{RID, ORCID} Kukačka, Libor (UT-L)_RID Jurčáková, Klára (UT-L)_{RID, ORCID} Uruba, Václav (UT-L)_{RID, ORCID} Jaňour, Zbyněk (UT-L)_{RID, ORCID}
Number of authors	5
Source Title	13th International Conference on Wind Engineerin. - Amsterdam : Multi-Science Publishing Co Ltd, 2011 - ISBN 978-1-907132-33-9
Pages	s. 1-8
Number of pages	8 s.
Publication form	flash disk - flash disk
Action	International Conference on Wind Engineerin /13./
Event date	10.07.2011-15.07.2011
VEvent location	Amsterdam
Country	NL - Netherlands
Event type	WRD
Language	eng - English
Country	NL - Netherlands
Keywords	wind-channel ; street canyon ; wavelet analysis ; POD
Subject RIV	DG - Athmosphere Sciences, Meteorology
CEZ	AV0Z20760514 - UT-L (2005-2011)
Annotation	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 between dynamics above two shapes of roof is found out.
Workplace	Institute of Thermomechanics
Contact	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Year of Publishing	2012

Number of the records: 1