Modelling of the Emission and Concentration Distribution of Vehicles in the Environment

Increasing number of vehicles on the Ukrainian roads requires reliable analysis and forecasting of ecological situation near highways. This issue is devoted to modeling the distribution concentration of emissions from vehicles with different input data. Based on diffusion model was developed a model that allows describing the general background pollution intensity at a given motor flow on the section line, and the changing intensity of emissions under different operating conditions of the engine: during acceleration, braking and stop the vehicle. The article shows the results of calculations of concentration changes depending on the initial concentration of harmful substances, vehicle speed, diffusion coefficient. In the process of solving this problem we used an approach that provides a spatial concentration field in any state of the atmosphere and airflow. The adequacy of the proposed mathematical model for the evaluation confirms the positive results of experimental studies of other authors. The advantages of proposed model are using minimum of experimental data and easy programming in applied mathematical packages.