Login | Register

Numerical evaluation of wind-induced dispersion of pollutants around buildings


Numerical evaluation of wind-induced dispersion of pollutants around buildings

Li, Ye (1998) Numerical evaluation of wind-induced dispersion of pollutants around buildings. PhD thesis, Concordia University.

[thumbnail of NQ39022.pdf]
Text (application/pdf)


A detailed and comprehensive numerical study of wind-induced pollutant dispersion around buildings has been carried out. Research in this area was reviewed and analyzed. The results from various studies were compared. Based on the review and the comparison with various studies, a more effective methodology for the numerical evaluation of dispersion of pollutants around buildings has been proposed. Computed results of a two-layer approach show various degrees of improvement for the concentration field in the wake region and on the back wall of the building. Results from two-layer approach also show improvement on the building roof for along-wind direction. However, the two-layer approach does not seem to work well for roof concentration along the cross-wind direction; this is probably due to the drawback of the isotropic turbulence model used. The previous numerical studies on pollutant dispersion around rectangular buildings only investigated the concentration profiles for along-wind direction or vertical direction, and these were only for limited situations. A systematic examination of pollutant concentration in the wake of a rectangular building has been carried out for two different release sources. The concentration profiles have been investigated for along-wind, across-wind and vertical directions for various locations. The numerical simulation results have been compared with those from the experiments and from the Modified Gaussian Model. Results from numerical simulation generally agree well with those from the experiments. It was found that the numerical simulation predicts ground level pollutant concentrations better than the Modified Gaussian Model in the near building wake area. The influence of numerical errors on the computed results and the effects of thresholds in the demoralization and convergence process have been investigated for the first time in the area of numerical simulation of pollutant dispersion around buildings

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (PhD)
Authors:Li, Ye
Pagination:xx, 219 leaves ; 29 cm.
Institution:Concordia University
Degree Name:Ph. D.
Program:Building, Civil and Environmental Engineering
Thesis Supervisor(s):Stathopoulos, Ted
Identification Number:TH 6031 L52 1998
ID Code:641
Deposited By: Concordia University Library
Deposited On:27 Aug 2009 17:13
Last Modified:13 Jul 2020 19:47
Related URLs:
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Downloads per month over past year

Research related to the current document (at the CORE website)
- Research related to the current document (at the CORE website)
Back to top Back to top