Air Quality Modeling of Santhepet Street Canyon of Mysore City Using FLUENT

Abstract

Automobile transport has become an inherent part of human life, and the adverse effect like air pollution is becoming more drastic. Vehicular traffic is leading to deterioration of air quality in the streets of Mysore city in recent years. It is very important to assess the impact of traffic related air pollution to take administrative decisions for improving air quality. In the present study, an attempt has been made to study the street canyon air quality by monitoring the concentration of pollutants like Suspended Particulate Matter (SPM), Sulfur dioxide (SO2) and Nitrogen dioxide (NO2) in Santhepet street canyon of Mysore city. Pollutants are monitored for 8 hours using instrument High Volume Air Sampler (HVAS) at two sampling stations in the canyon. During sampling period, the meteorological condition such as temperature, wind speed and humidity are found to be 33 0 C, 3-4km/hr and 50% respectively. The pollutants SPM, SO2 and NO2 concentration at sampling station 1 are 943.89, 15.73 and 1319.57 µg/m 3 and concentration of pollutants in sampling station 2 are 520.69, 13.93 and 350.87µg/m 3 respectively. Computational Fluid Dynamics (CFD) is a tool which assists in modeling the airflow and dispersion of pollutants among complex urban street canyons. FLUENT is the most widely used commercial CFD code for a range of flow applications. An attempt has been made to study the dispersion of the pollutants inside an urban street canyon using FLUENT.