Journal Facts

Journal
Journal of Environmental Systems
ISSN
0047-2433 (print) 1541-3802 (electronic)
Volume
33
Issue
1
Date
1/1/2011

Article Facts

Title
A CFD Model for Simulating Area Source Pollutant Dispersion in Urban Canyon
DOI
10.2190/ES.33.1.c
Author
Peng Wang
Pages
29-55
Online Date
01/19/2012

Article Links

A CFD Model for Simulating Area Source Pollutant Dispersion in Urban Canyon

Peng Wang

DOI: 10.2190/ES.33.1.c

Abstract

In this article, the urban canyon flow and dispersion field, turbulent kinetic energy field and pollutant concentration field are obtained by a three-dimensional computational fluid dynamics (CFD) model. The governing equations are the Reynolds-averaged equations of momentum, mass continuity, heat, and other scalar (here, passive pollutant) under the Boussinesq approximation with k-ε turbulent model. The concentration field in different layers of three planes was examined through making slices of flow field and streamline field. Through the analysis of the wind speed profile, turbulent kinetic energy profile and wind direction profile at the position of upwind, downwind, and middle canyon, some useful results were obtained. The simulation results were compared with the available wind tunnel experiments (Meroney et al., 1996) and favorable agreement between them was found.

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