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WIND TUNNEL MODELING OF CONTAMINANT SPREADING AT AN INTERSECTION DEPENDING ON THE APPROACH FLOW DIRECTION
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SYSNO ASEP 0333100 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title WIND TUNNEL MODELING OF CONTAMINANT SPREADING AT AN INTERSECTION DEPENDING ON THE APPROACH FLOW DIRECTION Title Fyzikální modelování změn difúze znečišťujících látek v oblasti křižovatky v závislosti na směru nabíhajícího proudění Author(s) Kukačka, Libor (UT-L) RID
Jurčáková, Klára (UT-L) RID, ORCID
Kellnerová, Radka (UT-L) RID, ORCID
Jaňour, Zbyněk (UT-L) RID, ORCIDSource Title Experimental Fluid Mechanics 2009, Proceedings of the International Conference. - Liberec : Technical University of Liberec, 2009 / Vít T. ; Dančová P. ; Dvořák V. - ISBN 978-80-7372-538-9 Pages s. 143-150 Number of pages 8 s. Action Experimental Fluid Mechanics 2009 Event date 25.11.2009-27.11.2009 VEvent location Liberec Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords air pollution ; boundary layer ; physical modelling ; contaminant spreading Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects OC 113 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The objective of this study is physical modelling of emissions from vehicle exhausts in street canyons within an urban area and the influence of the approach flow direction on contaminant spreading. The requirements of the similarity of the atmospheric boundary layer and a boundary layer in the wind tunnel are satisfied. For several flow directions mean velocity and concentration fields are measured within street canyon intersection inside symmetrical urban built-up area. Scalar fluxes are computed from measured data to quantify pollutant spreading. Results of the experiment show a significant sensitivity of the mean velocity field on the approach flow direction. The approach flow extensively influence contaminant spreading within the built-up area and therefore intensity of street canyons ventilation vary with the approach flow direction. The approximate flow direction with the most favourable dispersion conditions in the studied area is found out. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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