Prediction of Carbon Monoxide Concentration Due to Vehicular Emission Using Roe-Riemann Solver

Abstract

The Roe-Riemann solver, a finite volume difference method which has a great stability for prediction of fluid flow was developed for the prediction of carbon monoxide due to vehicular emission for input source strength emitted at a given value. Time, distance, air velocity and pollutant speed were the parameters considered in developing the dispersion model, which predicts the concentration profile for dispersion. The simulation of the model was carried out using the parameters (time, distance, air velocity and pollutant speed) to show the effect of air velocity and pollutant speed on concentration profile at various axial wind height/distance above ground level. From the results obtained, it shows that as the air velocity, pollutant speed and axial height/distance above ground level increases [(0.5m/s-2.5m/s), (2.50m/s-3.00m/s), (1m-11m)] respectively. The concentration of pollutant decreases from 0.98mol/m3 to 0.82mol/m3 due to dispersion of pollutant. It was observed that there is a great dispersion of pollutant concentration at high air velocity, pollutant speed and axial height/distance above ground level.