Modelování re-suspenze prachových částic řízené přízemní rychlostí a kinetickou energií turbulence v měsských uličních kaňonech

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F07%3APU70970" target="_blank" >RIV/00216305:26210/07:PU70970 - 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

Numerical Modeling of Street Canyon Particle Re-suspension Driven by Ground Air Velocity and Kinetic Energy of Turbulence

Popis výsledku v původním jazyce

This paper introduces the numerical modeling of re-suspension of once deposited particles in the studies street canyon located in a large urban area. The CFD code StarCD was used to build up the numerical model of the studied area and perform the calculations. We considered PM10 spherical particles with density 300 kg/m3. An air velocity predicted in the central nods of control volumes just above the ground surface was compared with the threshold re-suspension air velocity. With respect to detail geometry of a ground surface of the studied street canyon, we specified the threshold wind velocity at height of 0.35 m as 0.56 m/s. Three different variants of the driving air velocity calculations were tested. First, only a horizontal component of an air velocity was considered. Second, the driving velocity was expressed as a sum of a mean air velocity and a fluctuation air velocity component. The most realistic results were obtained with the driving velocity expressed as a sum of a mean air

Název v anglickém jazyce

Numerical Modeling of Street Canyon Particle Re-suspension Driven by Ground Air Velocity and Kinetic Energy of Turbulence

Popis výsledku anglicky

This paper introduces the numerical modeling of re-suspension of once deposited particles in the studies street canyon located in a large urban area. The CFD code StarCD was used to build up the numerical model of the studied area and perform the calculations. We considered PM10 spherical particles with density 300 kg/m3. An air velocity predicted in the central nods of control volumes just above the ground surface was compared with the threshold re-suspension air velocity. With respect to detail geometry of a ground surface of the studied street canyon, we specified the threshold wind velocity at height of 0.35 m as 0.56 m/s. Three different variants of the driving air velocity calculations were tested. First, only a horizontal component of an air velocity was considered. Second, the driving velocity was expressed as a sum of a mean air velocity and a fluctuation air velocity component. The most realistic results were obtained with the driving velocity expressed as a sum of a mean air

Druh

D - Stať ve sborníku

CEP obor

DI - Znečištění a kontrola vzduchu

OECD FORD obor

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Projekt

<a href="/cs/project/1P04OC633.001" target="_blank" >1P04OC633.001: Prachové částice v městském ovzduší: jejich transport a depozice v městských oblastech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the11th Interantional Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purpose

ISBN

978-1-873702-03-1

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

307-311

Název nakladatele

Cambridge Environmental research Consultants, Cambridge, UK

Místo vydání

Cambridge, UK

Místo konání akce

Cambrigde

Datum konání akce

2. 7. 2007

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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