Effects of space sizes on the dispersion of cough-generated droplets from a walking person

doi:10.1063/5.0034874

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	Effects of space sizes on the dispersion of cough-generated droplets from a walking person
	Li ZB(李曌斌); Wang HP(王洪平); Zhang XL(张鑫磊); Wu T(吴霆); Yang XL(杨晓雷)
发表期刊	PHYSICS OF FLUIDS
	2020-12-01
卷号	32 期号:12 页码:121705
ISSN	1070-6631
摘要	The dispersion of viral droplets plays a key role in the transmission of COVID-19. In this work, we analyze the dispersion of cough-generated droplets in the wake of a walking person for different space sizes. The air flow is simulated by solving the Reynolds-averaged Navier-Stokes equations, and the droplets are modeled as passive Lagrangian particles. Simulation results show that the cloud of droplets locates around and below the waist height of the manikin after 2 s from coughing, which indicates that kids walking behind an infectious patient are exposed to higher transmission risk than adults. More importantly, two distinct droplet dispersion modes occupying significantly different contamination regions are discovered. A slight change of space size is found being able to trigger the transition of dispersion modes even though the flow patterns are still similar. This shows the importance of accurately simulating the air flow in predicting the dispersion of viral droplets and implies the necessity to set different safe-distancing guidelines for different environments.
DOI	10.1063/5.0034874
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000600101600001
项目资助者	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics [11988102]
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Yang, XL
引用统计	被引频次：38[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85781
专题	非线性力学国家重点实验室
作者单位	1.{Li, Zhaobin、Wang, Hongping、Zhang, Xinlei、Wu, Ting、Yang, Xiaolei} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.{Li, Zhaobin、Wang, Hongping、Zhang, Xinlei、Wu, Ting、Yang, Xiaolei} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li ZB,Wang HP,Zhang XL,et al. Effects of space sizes on the dispersion of cough-generated droplets from a walking person[J]. PHYSICS OF FLUIDS,2020,32,12,:121705.
APA	李曌斌,王洪平,张鑫磊,吴霆,&杨晓雷.(2020).Effects of space sizes on the dispersion of cough-generated droplets from a walking person.PHYSICS OF FLUIDS,32(12),121705.
MLA	李曌斌,et al."Effects of space sizes on the dispersion of cough-generated droplets from a walking person".PHYSICS OF FLUIDS 32.12(2020):121705.

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