On the quadrant analysis of the flow in the street canyon

R. Kellnerová, V. Fuka, L. Kukačka, V. Uruba, Z. Jaňour, Petra Dančová, Petr Novontý
2013 EPJ Web of Conferences  
It is well known that sweep and ejection are major contributors to the momentum flux in the turbulent boundary layer. In order to evaluate the contribution of these events to the total flux, the wind-tunnel data measured by PIV technique were analyzed from spatial point of view. It was revealed that both the sweep and the ejection reach up to 90% of the flux momentum inside the canyon. Moreover, the sweep and ejection pass the street in an alternative fashion. When sweep reaches maximum, the
more » ... hes maximum, the ejection falls down to minimum and vice versa. The TKE energy is also very high in these particular events, reaching 80-90% of total TKE inside the street what makes the sweep and ejection to be the most important features in the flow.
doi:10.1051/epjconf/20134501132 fatcat:cloy4uaqmrgxnkb7ici34zljmq