Numerical Simulation of Air Flow and Particles Deposition and Studying about the Effect of Building Architecture in Dust Distribution

Nowadays, due to drying wetlands, burning fossil fuels and so on, the dust phenomenon has intensified. In addition to the consequences of environmental and technical pollution for dust, they also have psychological and social consequences. In the present study dust dispersion modeling using numerical simulation is done. The effects of changes in conditions and the architecture of the building by drawing lines and calculating the flow and pressure fields in dust concentration levels in all cases were evaluated. After reviewing the results, it was found that among the five areas identified in the first model, which areas are better places to avoid dust. The results showed a significant effect on the distribution of dust around the building with different architecture. The results also showed the more approaching to the earth surface; the more concentration of dust associated with greater fluctuations is, and differences of architecture in dust concentration at lower heights have greater effect. Furthermore, in present architectural form, for the case the building door is open, the accumulated dust is more than when the door is closed. The study is based on computational fluid dynamics and numerical model developed for commercial software ANSYS (FLUENT) is used to simulate the flow field and pollutant particles.