Laboratory tests were performed to investigate the trajectory of the Particulate Matters (PMs) after a pressure gradient is imposed. Later, field tests were performed next to a rail track upstream of a building with local wind, to confirm the laboratory results. In the current investigations, field tests are in compliance with the laboratory experiments. It is concluded that PM concentration is correlated with the wind velocity, wind direction and the imposed pressure gradient. Near the building within a distance equivalent to the building height, where the blockage is present, the effects of the imposed pressure gradient become more evident and PM concentration increases significantly. The wind direction may also lead to increase or decrease in PM concentration, depending on the urban aerodynamics. By increasing the wind velocity, the PM concentration drops in the blockage region, which can be associated to the vortex stretching phenomena.
|Advisor:||Rahai, Hamid R.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 52/05M(E), Masters Abstracts International|
|Keywords:||Distribution, Health impacts, Particulate matters, Trajectory|
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