Numerical study of particle spatial distribution under column attachment ventilation

Column attachment ventilation mode (CAV) is a new form of air distribution based on pillars widely distributed in buildings and uses the column-based Coanda effect to efficiently transport the supply air from the top of the room to the lower occupied zone. Since CAV is essentially a down-supply vent...

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Bibliographic Details
Published in:Journal of Building Engineering 2022-08, Vol.53, p.104599, Article 104599
Main Authors: Yin, Haiguo, Ji, Daina, Wang, Yuanyuan, Huo, Yaokun, Deng, Xin, Wang, Jiali, Ma, Zhenjun, Li, Angui
Format: Article
Language:English
Subjects:
Air distribution
CFD
Column attachment ventilation
Particle deposition
Particle dispersion
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Summary:Column attachment ventilation mode (CAV) is a new form of air distribution based on pillars widely distributed in buildings and uses the column-based Coanda effect to efficiently transport the supply air from the top of the room to the lower occupied zone. Since CAV is essentially a down-supply ventilation mode, it may lead to the resuspension of particulate matter (PM). In this study, considering the pollutant particle size, air supply velocity (u0), and air supply temperature difference (ΔT) (including cooling and heating conditions), a numerical simulation method was used to study the PM movement and diffusion characteristics. The results indicated that the particles (
ISSN:2352-7102
2352-7102
DOI:10.1016/j.jobe.2022.104599