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

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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

Czech name

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

Czech description

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

Type

D - Article in proceedings

CEP classification

DI - Pollution and air control

OECD FORD branch

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Project

<a href="/en/project/1P04OC633.001" target="_blank" >1P04OC633.001: Particulate Matter in urban air: transport and deposition in urban area</a><br>

Continuities

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

Publication year

2007

Confidentiality

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

Article name in the collection

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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Number of pages

5

Pages from-to

307-311

Publisher name

Cambridge Environmental research Consultants, Cambridge, UK

Place of publication

Cambridge, UK

Event location

Cambrigde

Event date

Jul 2, 2007

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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