Numerical Study on Pollutant Removal Performance of Vortex Ventilation in Different Pollutant Locations

This study presents the flow trajectory, pollutant distribution of vortex ventilation with different pollutant source locations. It turns out that due to pressure gradient of column vortex, the pollutant can be inhaled by the vortex after releasing when the sources are in the vortex zone. Meanwhile, due to the obvious tangential velocity and radial velocity of the column vortex, the flow trajectory of pollutant in vortex ventilation is close to a logarithmic spiral, which means that the farther the pollutant source from the vortex center, the longer the path of pollutant is, and the larger the pollution range is. The results indicate that the pollutant source should be in the range of vortex zone in the design, and it will reach the best performance when the pollutant source is just near the vortex core.