Comparative Study of Experiment And Les on Street Canyon Dynamics

0427473 - ÚT 2015 RIV GB eng A - Abstract
Kellnerová, Radka - Kukačka, Libor - Fuka, V. - Uruba, Václav - Jaňour, Zbyněk - Nosek, Štěpán
Comparative Study of Experiment And Les on Street Canyon Dynamics.
Proceedings of Abstracts 9th International Conference on Air Quality - Science and Application. Hatfield: University of Hertfordshire, 2014 - (Mitto, T.; Fallmann, J.; Mikolajczyk, U.; Suppan, P.; Singh, V.; Sokhi, R.). s. 186-186. ISBN 978-1-909291-20-1.
[International Conference on Air Quality - Science and Application /9./. 24.03.2014-28.03.2014, Garmisch-Partenkirchen]
R&D Projects: GA ČR GAP101/12/1554
Institutional support: RVO:61388998
Keywords : wind-tunnel * Street canyon * PIV * LES * validation * POD
Subject RIV: DG - Athmosphere Sciences, Meteorology

The paper deals with comparison between experimental data and numerical simulation concerning street canyon dynamics. Experimental data was obtained in the wind channel with Time-Resolved Particle Image Velocimetry (TR-PIV). By PIV, two components of velocity were measured in vertical plane at the axis of the channel. The almost identical boundary conditions were simulated by LES. The wind dynamics inside the street canyon was captured and then analysed by Fourier analysis, Wavelet analysis, Quadrant Reynolds decomposition, spatial and temporal correlation and Proper orthogonal decomposition (POD). These methods were consequently used for the mutual comparison between LES and experimental data was done. Some discrepancies were revealed in the time-mean values between LES and PIV. However the spectrum, momentum flux and especially POD yielded very similar results what suggests that dynamics in terms of variance was properly modelled by LES.
Permanent Link: http://hdl.handle.net/11104/0233213