Turbulent flow and scalar fluxes characteristics, case study on an intersection ventilation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F12%3A00376042" target="_blank" >RIV/61388998:_____/12:00376042 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Turbulent flow and scalar fluxes characteristics, case study on an intersection ventilation

Popis výsledku v původním jazyce

The objective of this study is to determine processes of pollution ventilation in the X-shaped street intersection within an idealized symmetric urban area for the changing approach flow direction. A unique experimental set-up for simultaneous wind tunnel measurement of the flow velocity and the tracer gas concentration in a high temporal resolution is assembled. Advective horizontal and vertical scalar fluxes are computed from averaged measured velocity and concentration data within the street intersection. Vertical turbulent scalar fluxes are computed from synchronized velocity and concentration signals measured in the plane above the intersection. All results are obtained for five approach flow directions. The influence of the approach flow to the advective and turbulent fluxes is determined. The contribution of the advective and turbulent flux to the ventilation is discussed. Wind direction with the best dispersive conditions in the area is found.

Název v anglickém jazyce

Turbulent flow and scalar fluxes characteristics, case study on an intersection ventilation

Popis výsledku anglicky

The objective of this study is to determine processes of pollution ventilation in the X-shaped street intersection within an idealized symmetric urban area for the changing approach flow direction. A unique experimental set-up for simultaneous wind tunnel measurement of the flow velocity and the tracer gas concentration in a high temporal resolution is assembled. Advective horizontal and vertical scalar fluxes are computed from averaged measured velocity and concentration data within the street intersection. Vertical turbulent scalar fluxes are computed from synchronized velocity and concentration signals measured in the plane above the intersection. All results are obtained for five approach flow directions. The influence of the approach flow to the advective and turbulent fluxes is determined. The contribution of the advective and turbulent flux to the ventilation is discussed. Wind direction with the best dispersive conditions in the area is found.

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

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

8th International Conference on Air Quality Science and Application

ISBN

978-1-907396-80-9

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

"S.1"-"4"

Název nakladatele

University of Hertfordshire

Místo vydání

Hatfield

Místo konání akce

Atheny

Datum konání akce

19. 3. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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