Transport dynamics of SARS-CoV-2 under outdoor conditions
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study aimed at estimating the transport dynamics of a single severe acute respiratory syndrome corona-virus 2 (SARS-CoV-2)-laden droplet of 1 to 500 mu m in diameter at a wind speed from 1 to 4 m/s. Motion dynamics of SARS-CoV-2-laden respiratory droplets under calm or turbulent air conditions were quantified using a combined model. Dalton's law was implemented to estimate their evaporation. One-factor-at-a-time procedure was applied for the sensitivity analysis of model of deposition velocity. The transport distance of the single virus ranged from 167 to 1120 m as a function of the droplet size, wind speed, and falling time. The evaporation times of the droplets <= 3 and <= 14 mu m in diameter were shorter than their settling times from 1.7 m in height at midnight and midday, respectively. Such droplets remained in the air for about 5 min as the droplet nuclei with SARS-CoV-2. The minimum transport distance of the respiratory droplets of 1-15 mu m varied between 8.99 and 142 m at a wind speed range of 1-4 m/s, based on their deposition velocity. With their short transport distance, the larger droplet (30 to 500 mu m) was not suspended in the air even under the windy conditions. The deposition velocity was found most sensitive to the droplet diameter. The droplets < 15 mu m in diameter completely evaporated at midday and the droplet nuclei with the single virus can travel a minimum distance of 500 m under a horizontal wind speed of 3 m/s.
Açıklama
Anahtar Kelimeler
COVID-19, Transport Distance, Respiratory Droplet Size, Dry Deposition, Evaporation, Model
Kaynak
Air Quality Atmosphere and Health
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
15
Sayı
5
Künye
Aydin, M., Evrendilek, F., Aydin, I. E., Savas, S. A., & Evrendilek, D. E. (2022). Transport dynamics of SARS-CoV-2 under outdoor conditions. Air Quality, Atmosphere & Health, 15(5), 893-899.
