Simulation of Air Pollution Transport Around Tall Buildings Using a Two-Dimensional Numerical Flow Solver

The results of a numerical model, which is recently developed by the authors, are presented in this paper. In this model the continuity equation and the equation of motion for inviscid flow are coupled with equation of pollution concentration transport. This numerical model presents a system of simple convective equations. The Cell Vertex Finite Volume Method is applied for solving the governing equations on triangular unstructured meshes. Using unstructured meshes provides great flexibility for modeling the flow in arbitrary and complex geometries, such as urban environments. The equation of continuity is simultaneously solved with convective equations in a coupled manner using Artificial Compressibility technique. In order to verify the model, numerical results have been compared with available experimental measurements for pollutant dispersion in an urbanstreet canyon. The efficiency of the developed computer code is demonstrated by its application to simulation pollutant transport in urban environments