Počet záznamů: 1

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

SYSNO ASEP	0346081
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Estimation of scalar fluxes within modelled intersection depending on the approach flow direction
Tvůrce(i)	Kukačka, Libor (UT-L)_RID Kellnerová, Radka (UT-L)_{RID, ORCID} Jurčáková, Klára (UT-L)_{RID, ORCID} Jaňour, Zbyněk (UT-L)_{RID, ORCID}
Celkový počet autorů	4
Zdroj.dok.	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
Rozsah stran	s. 797-801
Poč.str.	5 s.
Akce	International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes
Datum konání	01.06.2010-04.06.2010
Místo konání	Paris
Země	FR - Francie
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	FR - Francie
Klíč. slova	air pollution ; atmospheric boundary layer ; physical modelling ; contaminant spreading
Vědní obor RIV	DG - Vědy o atmosféře, meteorologie
CEZ	AV0Z20760514 - UT-L (2005-2011)
Anotace	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.
Pracoviště	Ústav termomechaniky
Kontakt	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Rok sběru	2011

Počet záznamů: 1