Number of the records: 1

Estimation of scalar fluxes within modelled intersection depending on the approach flow direction

SYSNO ASEP	0346081
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Estimation of scalar fluxes within modelled intersection depending on the approach flow direction
Author(s)	Kukačka, Libor (UT-L)_RID Kellnerová, Radka (UT-L)_{RID, ORCID} Jurčáková, Klára (UT-L)_{RID, ORCID} Jaňour, Zbyněk (UT-L)_{RID, ORCID}
Number of authors	4
Source Title	Proceedings of the 13th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes. - Boulogne-Billancourt : ARIA Technologies, 2010 - ISBN 2-8681-5062-4
Pages	s. 797-801
Number of pages	5 s.
Action	International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes
Event date	01.06.2010-04.06.2010
VEvent location	Paris
Country	FR - France
Event type	WRD
Language	eng - English
Country	FR - France
Keywords	air pollution ; atmospheric boundary layer ; physical modelling ; contaminant spreading
Subject RIV	DG - Athmosphere Sciences, Meteorology
CEZ	AV0Z20760514 - UT-L (2005-2011)
Annotation	In built-up areas street intersections represent regions of dangerous pollutant exchanges between street-canyons. The objective of this study is to investigate the influence of the approach flow direction on contaminant spreading within an intersection in an idealised symmetrical urban area. Mean velocity and concentration fields are measured at an urban area model in wind tunnel for five wind directions. Horizontal and vertical advective scalar fluxes are computed from measured data to quantify pollutant spreading. Experiment results show a significant sensitivity of measured quantities within the area on the approach flow direction. The highest contaminant concentrations and fluxes are measured in the bottom parts of street-canyons. The important role of the vertical turbulent scalar flux in street-canyon ventilation is expected because of non-zero sum of measured advective fluxes in the closed area. The set-up with the most favourable dispersion conditions in the studied area was found.
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	2011

Number of the records: 1