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The motion of respiratory droplets produced by coughing

文献类型：期刊论文

作者Wang HP(王洪平); Li ZB; Zhang XL; Zhu LX; Liu Y; Wang SZ(王士召); Wang SZ(王士召)
刊名PHYSICS OF FLUIDS
出版日期2020-12-01
卷号32期号:12页码:125102
关键词TIME CORRELATIONS AIR ENVIRONMENTS EVAPORATION
ISSN号1070-6631
DOI10.1063/5.0033849
英文摘要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.
分类号一类/力学重要期刊
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:000596169900002
资助机构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}
其他责任者Wang, SZ
源URL[http://dspace.imech.ac.cn/handle/311007/85413]  
专题力学研究所_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} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China
2.{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
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 王洪平.,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 王洪平,et al."The motion of respiratory droplets produced by coughing".PHYSICS OF FLUIDS 32.12(2020):125102.

入库方式： OAI收割

来源：力学研究所

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