Research Article Open Access

Evaluation of Gaussian Plume Model against CFD Simulations through the Estimation of CO and NO Concentrations in an Urban Area

Mahmoud Bady1
  • 1 Assiut University, Egypt

Abstract

Dispersion of air pollutants, Carbon monoxide (CO) and Nitrogen oxide (NO), due to three point sources and a high-density traffic road in an urban area located near the center of Tokyo, Japan was studied using two different approaches. The first is an analytical approach using Gaussian Plume Model (GPM) while the second is a numerical approach using Computational Fluid Dynamics (CFD) simulations. In the first approach, the study area was divided into a fine grid and the traffic road was treated as a number of continuous adjacent stacks. The GPM was applied upon each stack and the concentration at each receptor was calculated using the principle of superposition. CFD simulations were carried out where steady state analysis was adopted and the standard k-ε turbulence model was used. The concentrations calculated with the two approaches were compared together. The study results show that the agreement between the concentrations estimated by the two approaches was good in low-density built-up locations within the study area while significant deviation was obtained for high-density locations. Such result reflects the fact that the GPM is poor in predicting the actual concentrations in cases of densely urban areas.

American Journal of Environmental Sciences
Volume 13 No. 2, 2017, 93-102

DOI: https://doi.org/10.3844/ajessp.2017.93.102

Submitted On: 6 December 2015 Published On: 12 April 2017

How to Cite: Bady, M. (2017). Evaluation of Gaussian Plume Model against CFD Simulations through the Estimation of CO and NO Concentrations in an Urban Area. American Journal of Environmental Sciences, 13(2), 93-102. https://doi.org/10.3844/ajessp.2017.93.102

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Keywords

  • Gaussian Plume Model
  • Pollutant Concentration
  • Urban Area
  • Wind Flow