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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)
Source PublicationPHYSICS OF FLUIDS
2020-12-01
Volume32Issue:12Pages:121705
ISSN1070-6631
AbstractThe 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.
DOI10.1063/5.0034874
Indexed BySCI ; EI
Language英语
WOS IDWOS:000600101600001
Funding OrganizationNSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics [11988102]
Classification一类/力学重要期刊
Ranking1
ContributorYang, XL
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/85781
Collection非线性力学国家重点实验室
Affiliation1.{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
Recommended Citation
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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