Ventilation Processes in a Three-Dimensional Street Canyon

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F16%3A00458864" target="_blank" >RIV/61388998:_____/16:00458864 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10546-016-0132-2" target="_blank" >http://dx.doi.org/10.1007/s10546-016-0132-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10546-016-0132-2" target="_blank" >10.1007/s10546-016-0132-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ventilation Processes in a Three-Dimensional Street Canyon

Popis výsledku v původním jazyce

The ventilation processes in three different street canyons of variable roof geometry were investigated in a wind tunnel using a ground-level line source. A constant roof height was used in the first case, while a variable roof height along the leeward or windward walls was simulated in the two other cases. All street-canyon models were exposed to a neutrally stratified flow with two approaching wind directions, perpendicular and oblique. The relative pollutant removals and spatially-averaged concentrations within the canyons revealed that the model with constant roof height has higher re-emissions than models with variable roof heights. The nomenclature for the ventilation processes according to quadrant analysis of the pollutant flux was introduced. The venting of polluted air increased when the wind direction changed from perpendicular to oblique, irrespective of the studied canyon model. Strong correlations (>0.5) between coherent structures and ventilation processes were found at roof level, irrespective of the canyon model and wind direction.

Název v anglickém jazyce

Ventilation Processes in a Three-Dimensional Street Canyon

Popis výsledku anglicky

The ventilation processes in three different street canyons of variable roof geometry were investigated in a wind tunnel using a ground-level line source. A constant roof height was used in the first case, while a variable roof height along the leeward or windward walls was simulated in the two other cases. All street-canyon models were exposed to a neutrally stratified flow with two approaching wind directions, perpendicular and oblique. The relative pollutant removals and spatially-averaged concentrations within the canyons revealed that the model with constant roof height has higher re-emissions than models with variable roof heights. The nomenclature for the ventilation processes according to quadrant analysis of the pollutant flux was introduced. The venting of polluted air increased when the wind direction changed from perpendicular to oblique, irrespective of the studied canyon model. Strong correlations (>0.5) between coherent structures and ventilation processes were found at roof level, irrespective of the canyon model and wind direction.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Boundary Layer Meteorology

ISSN

0006-8314

e-ISSN

—

Svazek periodika

159

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

26

Strana od-do

259-284

Kód UT WoS článku

000374666100005

EID výsledku v databázi Scopus

2-s2.0-84957027027