The motion of respiratory droplets produced by coughing | |
Wang HP(王洪平); Li ZB(李曌斌); Zhang XL(张鑫磊); Zhu LX(朱力行); Liu Y(刘毅); Wang SZ(王士召) | |
发表期刊 | PHYSICS OF FLUIDS |
2020-12-01 | |
卷号 | 32期号:12页码:125102 |
ISSN | 1070-6631 |
摘要 | Coronavirus disease 2019 has become a global pandemic infectious respiratory disease with high mortality and infectiousness. This paper investigates respiratory droplet transmission, which is critical to understanding, modeling, and controlling epidemics. In the present work, we implemented flow visualization, particle image velocimetry, and particle shadow tracking velocimetry to measure the velocity of the airflow and droplets involved in coughing and then constructed a physical model considering the evaporation effect to predict the motion of droplets under different weather conditions. The experimental results indicate that the convection velocity of cough airflow presents the relationship t(-0.7) with time; hence, the distance from the cougher increases by t(0.3) in the range of our measurement domain. Substituting these experimental results into the physical model reveals that small droplets (initial diameter D <= 100 mu m) evaporate to droplet nuclei and that large droplets with D >= 500 mu m and an initial velocity u(0) >= 5 m/s travel more than 2 m. Winter conditions of low temperature and high relative humidity can cause more droplets to settle to the ground, which may be a possible driver of a second pandemic wave in the autumn and winter seasons. |
关键词 | TIME CORRELATIONS AIR ENVIRONMENTS EVAPORATION |
DOI | 10.1063/5.0033849 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000596169900002 |
WOS研究方向 | Mechanics ; Physics |
WOS类目 | Mechanics ; Physics, Fluids & Plasmas |
项目资助者 | NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics [11988102} ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11702302, 91752118, 11672305} ; Chinese Academy of SciencesChinese Academy of Sciences [QYZDJ-SSW-SYS002, XDB22040104} |
论文分区 | 一类/力学重要期刊 |
力学所作者排名 | 1 |
RpAuthor | Wang, SZ |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/85413 |
专题 | 非线性力学国家重点实验室 |
作者单位 | 1.{Wang Hongping, Li Zhaobin, Zhang Xinlei, Zhu Lixing, Liu Yi, Wang Shizhao} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 2.{Wang Hongping, Li Zhaobin, Zhang Xinlei, Zhu Lixing, Liu Yi, Wang Shizhao} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China |
推荐引用方式 GB/T 7714 | Wang HP,Li ZB,Zhang XL,et al. The motion of respiratory droplets produced by coughing[J]. PHYSICS OF FLUIDS,2020,32,12,:125102. |
APA | Wang HP,Li ZB,Zhang XL,Zhu LX,Liu Y,&Wang SZ.(2020).The motion of respiratory droplets produced by coughing.PHYSICS OF FLUIDS,32(12),125102. |
MLA | Wang HP,et al."The motion of respiratory droplets produced by coughing".PHYSICS OF FLUIDS 32.12(2020):125102. |
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