Abstract
This paper investigates the transmission characteristics of cough droplets from infected individuals in office environments under the influence of an impinging jet ventilation (IJV) system based on the Eulerian-Lagrangian model. The accuracy of the dispersed phase model and the IJV system simulation was validated by analyzing a single droplet evaporation model, publicly available jet experimental results, and previously simulated results. The effects of different exhaust locations, the relative positioning of the IJV system to the infected individual, and the application of partitions on the spatial propagation characteristics of droplets are explored. The results indicate that partitions exhibit a significant ability to obstruct and capture droplets. Under static conditions, they are capable of capturing over 36% of droplets generated by coughing, although this efficiency may be slightly influenced by the ventilation system. The IJV system notably affects droplet movement, with droplets progressively converging toward the upper-left corner of the room as the airflow develops. The positioning of the exhausts, in combination with the IJV system, is crucial in impeding and removing droplets. Taking into account variations in the infected individual's position, a centrally located exhaust arrangement might provide the more effective inhibition of virus droplet dispersion. © 2025 Author(s).
| Original language | English |
|---|---|
| Article number | 013316 |
| Journal | Physics of Fluids |
| Volume | 37 |
| Issue number | 1 |
| Online published | 6 Jan 2025 |
| DOIs | |
| Publication status | Published - Jan 2025 |
Funding
This work was accomplished by the supports of the Independent Exploration of Graduate Students of Central South University of China (No. 1053320220657) and Strategic Research Grants of City University of Hong Kong (No. 7005679 and 7005564).
Publisher's Copyright Statement
- COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Puyang Zhang, Xinchao Su, Weizhen Lu, Kan He, Guangjun Gao, Fan Wu; Impinging jet ventilation: Mitigating influenza transmission through partition and exhaust layout optimization. Physics of Fluids 1 January 2025; 37 (1): 013316 and may be found at https://doi.org/10.1063/5.0247620.
