Effects of Staggered Array of Cubical Obstacles on NearGround Wind Environment and Air Quality

Authors

  • Muhammad Noor Afiq Witri Muhammad Yazid School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Asyraf Sharif Badar Sharif School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Nor Azwadi Che Sidik Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia
  • Mohd Hafizal Hanipah Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia
  • Fazila Mohd Zawawi School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • Ummikalsom Abidin School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia

Keywords:

staggered urban layout, wind environment, pollutant dispersion, computational fluid dynamic (CFD) simulation

Abstract

Deterioration of natural ventilation in outdoor environments due to rapid urbanisation has raised the issues pertaining to pedestrians’ thermal comforts and pollutant exposures. There are substantial interests in the recent years to get an insight on how deficient these situations are and later propose the appropriate urban layout for optimum wind ventilation in a dense urban area. The objective of this paper is to numerically study the effects of urban layouts (i.e., staggered arrangements and cubes’ densities) on wind ventilation and air quality near the ground subjected to one wind direction; perpendicular to the disposition direction. Computational fluid dynamics simulations were carried out by the use of standard k?? turbulence model and found to be in fair agreement against the experimental data. Our result showed that loosely packed cubes exhibited lower pollutant concentration and higher wind speed near the ground compared to medium and densely packed cubes. Air quality was improved in closely packed cubes with staggered layout but did not show any improvement in medium and loosely packed cubes with staggered layout. Adversely, disposition of cubes exhibited lower wind speed compared to regular cubes for all street gap sizes. This paper also illustrates a practical strategy in optimising building layouts for wind flow enhancement and air quality improvement in an idealised urban area.

Downloads

Published

2020-12-16

How to Cite

Muhammad Yazid, M. N. A. W. ., Badar Sharif, A. S. ., Che Sidik, N. A. ., Hanipah, M. H. ., Mohd Zawawi, . F. ., & Abidin, U. . (2020). Effects of Staggered Array of Cubical Obstacles on NearGround Wind Environment and Air Quality. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 58(2), 261–274. Retrieved from https://akademiabaru.com/submit/index.php/arfmts/article/view/2587

Issue

Section

Articles

Most read articles by the same author(s)

1 2 3 > >>