M. Han*, R. Ooka, H. Kikumoto, W. Oh, Y. Bu, S. Hu.Measurements of exhaled airflow velocity through human coughs using particle image velocimetry. (SCI检索)
发布时间：2021-06-22
点击次数：
- 论文类型：
- 期刊论文
- 论文编号：
- 108020
- 发表刊物：
- Building and Environment
- 收录刊物：
- SCI
- 学科门类：
- 工学
- 一级学科：
- 建筑学
- 文献类型：
- J
- 卷号：
- 202
- 期号：
- September 2021
- 关键字：
- Cough; Velocity profile; Cough duration time; Peak velocity time; Cough spread angle; Particle image velocimetry
- DOI码：
- 10.1016/j.buildenv.2021.108020
- 发表时间：
- 2021-06-09
- 影响因子：
- 6.456
- 摘要：
- The sudden outbreak of coronavirus (COVID-19) has infected over 100 million people and led to over two million deaths (data in January 2021), posing a significant threat to global human health. As a potential carrier of the novel coronavirus, the exhaled airflow of infected individuals through coughs is significant in virus transmission. The research of detailed airflow characteristics and velocity distributions is insufficient because most previous studies utilize particle image velocimetry (PIV) with low frequency. This study measured the airflow velocity of human coughs in a chamber using PIV with high frequency (interval: 1/2986 s) to provide a detailed validation database for droplet propagation CFD simulation. Sixty cough cases for ten young healthy nonsmoking volunteers (five males and five females) were analyzed. Ensemble-average operations were conducted to eliminate individual variations. Vertical and horizontal velocity distributions were measured around the mouth area. Overall cough characteristics such as cough duration time (CDT), peak velocity time (PVT), maximum velocities, and cough spread angle were obtained. The CDT of the cough airflow was 520–560 m s, while PVT was 20 m s. The male/female averaged maximum velocities were 15.2/13.1 m/s. The average vertical/horizontal cough spread angle was 15.3°/13.3° for males and 15.6°/14.2° for females. In addition, the spatial and temporal distributions of ensemble-averaged velocity profiles were obtained in the vertical and horizontal directions. The experimental data can provide a detailed validation database the basis for further study on the influence of cough airflow on virus transmission using computational fluid dynamic simulations.
- 备注：
- 中科院1区TOP，JCR1区
- 上一条：M. Han*, R. Ooka, H. Kikumoto. A wall function approach in lattice Boltzmann method: algorithm and validation using turbulent channel flow. (SCI检索)
- 下一条：Mengtao Han*, Royzo Ooka, Hideki Kikumoto. Effects of wall function model in lattice Boltzmann method-based large-eddy simulation on built environment flows. (SCI检索)