ROLE OF INDIVIDUAL BUILDINGS IN SCALAR TRANSFER

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ROLE OF INDIVIDUAL BUILDINGS IN SCALAR TRANSFER

Popis výsledku v původním jazyce

The vertical ventilation of a gaseous pollutant released at the street level to the relatively unobstructed flow above the urban canopy is the main interest of our study. Simultaneous measurement of passive tracer concentration and vertical wind component with high temporal resolution is very unique technique and allows us to directly derive the advective and turbulent vertical scalar transfer terms. Comparison of the measurements within 18 different arrangements of idealised urban canopies (with different packing densities, building layouts, and height variations) is shown. Both advective and turbulent vertical scalar transfer is enhanced in denser set-ups and set-ups with high variability of building heights. The individual buildings and their uniqueheights are important for the advective vertical transport and this phenomenon is stronger for denser set-ups. The turbulent vertical transport characteristics are mainly given by general urban roughness performance.

Název v anglickém jazyce

ROLE OF INDIVIDUAL BUILDINGS IN SCALAR TRANSFER

Popis výsledku anglicky

The vertical ventilation of a gaseous pollutant released at the street level to the relatively unobstructed flow above the urban canopy is the main interest of our study. Simultaneous measurement of passive tracer concentration and vertical wind component with high temporal resolution is very unique technique and allows us to directly derive the advective and turbulent vertical scalar transfer terms. Comparison of the measurements within 18 different arrangements of idealised urban canopies (with different packing densities, building layouts, and height variations) is shown. Both advective and turbulent vertical scalar transfer is enhanced in denser set-ups and set-ups with high variability of building heights. The individual buildings and their uniqueheights are important for the advective vertical transport and this phenomenon is stronger for denser set-ups. The turbulent vertical transport characteristics are mainly given by general urban roughness performance.

Druh

D - Stať ve sborníku

CEP obor

DG - Vědy o atmosféře, meteorologie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the Conference on Physical Modelling of Flow and Dispersion Phenomena

ISBN

978-2-930389-42-7

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

von Karman Institute for Fluid Dynamics

Místo vydání

Rhode-St-Genése

Místo konání akce

Rhode-St-Genése

Datum konání akce

24. 8. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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