A model for indoor motion dynamics of SARS-CoV-2 as a function of respiratory droplet size and evaporation.
Environ Monit Assess
; 193(10): 626, 2021 Sep 05.
Article
in English
| MEDLINE | ID: covidwho-1411741
ABSTRACT
A simplified model has been devised to estimate the falling dynamics of severe acute respiratory syndrome corona-virus 2 (SARS-CoV-2)-laden droplets in an indoor environment. Our estimations were compared to existing literature data. The spread of SARS-CoV-2 is closely coupled to its falling dynamics as a function of respiratory droplet diameter (1 to 2000 µm) of an infected person and droplet evaporation. The falling time of SARS-CoV-2 with a respiratory droplet diameter of about 300 µm from a height of 1.7 m remained almost the same among the Newtonian lift equation, Stokes's law, and our simplified model derived from them so as to account for its evaporation. The evaporative demand peaked at midday which was ten times that at midnight. The evaporating droplets [Formula see text] 6 µm lost their water content rapidly, making their lifetimes in the air shorter than their falling times. The droplets [Formula see text] 6 µm were able to evaporate completely and remained in the air for about 5 min as droplet nuclei with SARS-CoV-2.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Environmental Monitoring
/
Aerosols
/
Air Microbiology
/
SARS-CoV-2
Limits:
Humans
Language:
English
Journal:
Environ Monit Assess
Journal subject:
Environmental Health
Year:
2021
Document Type:
Article
Affiliation country:
S10661-021-09382-7
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