Numerical simulation of wind flow structures and pollutant dispersion within street canyon under thermally unstable atmospheric conditions

Afiq Witri Muhammad Yazid, Nor Azwadi Che Sidik, Salim Mohamed Salim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Numerical studies were conducted to envisage the wind flow structures and pollutant dispersion in street canyon for differential heated wall and Froude numbers. Standard k-ε was used as its shows good accuracy compared to Renormalization Group (RNG) k-ε and Realizable k-ε. The obtained results demonstrate that the differentially heated wall/floor gives significant effects on the wind flow field compared with those under isothermal conditions. At high Froude number, there were no discernible effects on the flow structures and pollutant dispersion. At low Froude number however, vortex intensification was observed for the case of ground or leeward heated wall and results in reduced pollutant in street canyon. Meanwhile, for the case of windward heated wall, the ventilation was much reduced and results in higher pollutant in street canyon.

Original languageEnglish
Title of host publicationApplied Mechanics and Materials
PublisherTrans Tech Publications
Pages655-659
Number of pages5
Volume554
ISBN (Print)9783038351092
DOIs
Publication statusPublished - 2014

Publication series

NameApplied Mechanics and Materials
Volume554
ISSN (Print)16609336
ISSN (Electronic)16627482

Keywords

  • Pollutant dispersion
  • Street canyon
  • Thermal flow
  • Turbulence models
  • Wind flow structures

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yazid, A. W. M., Che Sidik, N. A., & Mohamed Salim, S. (2014). Numerical simulation of wind flow structures and pollutant dispersion within street canyon under thermally unstable atmospheric conditions. In Applied Mechanics and Materials (Vol. 554, pp. 655-659). (Applied Mechanics and Materials; Vol. 554). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AMM.554.655