Contribution of Advective and Turbulent Contaminant Transport to the Intersection Ventilation

0422518 - ÚT 2014 RIV NL eng C - Conference Paper (international conference)
Kukačka, Libor - Nosek, Štěpán - Kellnerová, Radka - Jurčáková, Klára - Jaňour, Zbyněk
Contribution of Advective and Turbulent Contaminant Transport to the Intersection Ventilation.
Air Pollution Modelling and its Application XXII. Dordrecht: Springer, 2014 - (Steyn, D.; Builtjes, P.; Timmermans, R.), s. 665-668. NATO Science for Peace and Security Series C: Environmental Security. ISBN 978-94-007-5576-5. ISSN 1874-6519.
[ITM 2012. NATO/SPS International Technical Meeting on Air Pollution Modelling and its Application /32/. Utrecht (NL), 07.05.2012-11.05.2012]
R&D Projects: GA ČR GAP101/12/1554; GA MŠMT LD12007
Institutional research plan: CEZ:AV0Z20760514
Keywords : air pollution * boundary layer * contaminant transport * pollution fluxes
Subject RIV: DG - Athmosphere Sciences, Meteorology

The objective of this experimental study is to determine processes of pollution ventilation above the X-shaped street intersection in an idealised symmetric urban area for several approach flow directions. A unique experimental set-up for simultaneous measurement of the flow velocity and the tracer gas concentration in a high temporal resolution is assembled. Advective and turbulent vertical scalar fluxes are computed from the measured data in a horizontal plane above the street intersection. Vertical turbulent pollution transport was found to be a significant and positive contribution to the total vertical transport of pollutants form the intersection. Prevailing events in vertical scalar and momentum fluxes were determined using quadrant analysis.
Permanent Link: http://hdl.handle.net/11104/0229524