Wind tunnel measurement of turbulent and advective scalar fluxes, case study on an intersection ventilation

0370998 - ÚT 2012 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kukačka, Libor - Nosek, Štěpán - Kellnerová, Radka - Jurčáková, Klára - Jaňour, Zbyněk
Wind tunnel measurement of turbulent and advective scalar fluxes, case study on an intersection ventilation.
Experimental Fluid Mechanics 2011. Liberec: Technical University of Liberec, 2011 - (Vít, T.; Dančová, P.; Movotný, P.), s. 778-784. ISBN 978-80-7372-784-0.
[Experimental Fluid Mechanics 2011. Jičín (CZ), 22.11.2011-25.11.2011]
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: air pollution * atmospheric boundary layer * wind tunnel modelling * contaminant spreading * scalar fluxes
Kód oboru RIV: DG - Vědy o atmosféře, meteorologie
www.kez.tul.cz

The objective of this study is to determine processes of vertical ventilation above the X-shaped intersection in an idealised symmetric urban area in several approach flow directions. An experimental set-up for simultaneous measurement of the flow velocity and the tracer gas concentration was assembled. Vertical advective and turbulent fluxes of passive contaminant were computed from synchronised measured velocity and concentration signals in a regular grid placed at the roof top level above the studied intersection. Spatial distribution and contributions of the turbulent transport to ventilation of the area were determined.
Trvalý link: http://hdl.handle.net/11104/0204652