Počet záznamů: 1
PIV measurement of turbulent flow within a street canyon: Detection of coherent motion
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SYSNO ASEP 0376552 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název PIV measurement of turbulent flow within a street canyon: Detection of coherent motion Tvůrce(i) 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, ORCIDZdroj.dok. Journal of Wind Engineering and Industrial Aerodynamics. - : Elsevier - ISSN 0167-6105
Roč. 104, SI (2012), s. 302-313Poč.str. 12 s. Forma vydání Tištěná - P Akce International Conference on Wind Engineering /13./ Datum konání 10.07.2011-15.07.2011 Místo konání Amsterdam Země NL - Nizozemsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova wind-channel ; street canyon ; quadrant analysis ; wavelet analysis ; PIV ; POD Vědní obor RIV DG - Vědy o atmosféře, meteorologie CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000307609200032 DOI 10.1016/j.jweia.2012.02.017 Anotace Velocity measurements inside a street canyon were performed by means of particle image velocimetry (PIV) in a wind-channel. Two geometries were used for comparison purposes: buildings with pitched roofs and with flat roofs. Both induce different dynamic regimes in the street. 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 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 frequency present in the modes. Vorticity was decomposed by POD as well. Finally, the correlation between the vorticity and other methods for vortex detection was assessed. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2013
Počet záznamů: 1