Flow dynamics of droplets expelled during sneezing.
Journal
Physics of fluids (Woodbury, N.Y. : 1994)
ISSN: 1070-6631
Titre abrégé: Phys Fluids (1994)
Pays: United States
ID NLM: 101286829
Informations de publication
Date de publication:
Nov 2021
Nov 2021
Historique:
received:
18
08
2021
accepted:
09
10
2021
entrez:
22
11
2021
pubmed:
23
11
2021
medline:
23
11
2021
Statut:
ppublish
Résumé
Respiratory infections transmit through droplets and aerosols generated by the infected individual during respiratory emissions. It is essential to study the flow dynamics of these emissions to develop strategies for mitigating the risk of infection. In particular, the dynamics of droplets expelled during violent exhalations such as sneezing is crucial, but has received little attention to date. Here, for the first time, we present the results of droplet dynamics of 35 sneezes, obtained from four volunteers, using particle tracking velocimetry experiments. Our results reveal a mean droplet velocity of 2-5.4 m/s across the different subjects. These values are significantly lower than what is usually assumed in the studies simulating or replicating sneezes. Furthermore, the large variation in droplet speeds, flow direction, spread angle, and head movement is also quantified. These findings will enable the refinement of models and simulations of sneezes toward improving infection control guidelines.
Identifiants
pubmed: 34803362
doi: 10.1063/5.0067609
pii: 5.0067609
pmc: PMC8597717
doi:
Types de publication
Journal Article
Langues
eng
Pagination
111901Informations de copyright
© 2021 Author(s).
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