Numerical simulation of flow and dispersion around an isolated cubical building: The effect of the atmospheric stratification

The aim of this work is to investigate atmospheric flow and dispersion of contaminants in the vicinity of single buildings under different stability conditions. The mathematical model used is based on the solution of equations of conservation of mass, linear momentum and energy with the use of a non...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2009-11, Vol.43 (34), p.5484-5492
Main Authors: Santos, Jane Meri, Reis, Neyval Costa, Goulart, Elisa Valentim, Mavroidis, Ilias
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric dispersion
Atmospheric pollution
Atmospherics
Building effects
Computer simulation
Deviation
Dispersions
Earth, ocean, space
Exact sciences and technology
External geophysics
Mathematical analysis
Mathematical models
Meteorology
Obstacles
Pollution
Production of turbulent kinetic energy
Stability conditions
Wall function
Wind tunnels
κ– ɛ Model
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Summary:The aim of this work is to investigate atmospheric flow and dispersion of contaminants in the vicinity of single buildings under different stability conditions. The mathematical model used is based on the solution of equations of conservation of mass, linear momentum and energy with the use of a non-standard κ– ɛ turbulence model. The modifications proposed in the κ– ɛ model are the inclusion of the Kato and Launder correction in the production of turbulent kinetic energy and the use of a modified wall function. Results are presented of numerical simulations of dispersion around a cubical obstacle, under neutral, stable and unstable atmospheric conditions. Experimental data from wind tunnel and field trials obtained by previous authors are used to validate the numerical results. The numerical simulation results show a reasonable level of agreement with field and wind tunnel concentration data. The deviation between model results and field experimental data is of the same order as the deviation between field and wind tunnel data.
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2009.07.020