Numerical study on the cross-floor transmission characteristics of aerosol pollutants:effect of building thermal plume
The building wall thermal plume causing by solar irradiation and horizontal inertial force can significantly affect the diffusion and cross-floor transmission of pollutants along the building vertical surface.In this study,the wind-tunnel experiments and numerical simulation were used to investigate the effect of thermal plume intensity on cross-floor transmission characteristics of aerosol pollutants along the building facades in a 6-story residential building.Richardson number(Ri)is used to assess the thermal plume intensity along the building facades.The study shows that the thermal plume on the building facades has a great influence on the diffusion of aerosol pollutants.When Ri＜2.28,pollutants mainly accumulate near the ground on the windward surface,leading to higher pollutants concentration near the ground.When Ri≥2.28,pollutants diffuse to higher levels,causing serious risks of cross-floor pollutants dispersion.
building thermal plumepollutants dispersioncross-floor transmissionwind tunnel experimentnumerical simulation
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