Numerical evaluation of wind-induced dispersion of pollutants around a building

Abstract Wind flow perturbations, recirculations and turbulence generated by buildings often dominate air pollutant distributions around buildings; this may be a great concern for engineers, architects and health professionals. The paper refers to an attempt to evaluate the air pollutant distribution around a building by solving the concentration equation based on the previously simulated wind flow field. The paper shows the application of the hybrid scheme for the evaluation of pollutant concentration around a rectangular building for two different sources under conditions of neutral atmospheric stratification. Results have been compared to the available experimental data from previous studies in boundary layer wind tunnels. Data agree well far downwind of the building but agree less satisfactorily close to the wall and within the wake zone.

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