Transition from saliva droplets to solid aerosols in the context of COVID-19 spreading
| Autor: | Mehdi Stiti, Edouard Berrocal, Guillaume Castanet, Andrew Corber, Marcus Aldén |
|---|---|
| Přispěvatelé: | Lund University [Lund], Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA ), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), National Research Council of Canada (NRC), Swedish Research Council (Vetenskapsrådet 2016–03894), European Project: 638546,H2020,ERC-2014-STG,Spray-Imaging(2015) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Saliva
Materials science Coronavirus disease 2019 (COVID-19) Context (language use) 010501 environmental sciences 01 natural sciences Biochemistry Airborne transmission Article 010305 fluids & plasmas 0103 physical sciences Humans Speech Relative humidity ComputingMilieux_MISCELLANEOUS Droplets 0105 earth and related environmental sciences General Environmental Science Saliva evaporation Aerosols SARS-CoV-2 [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment COVID-19 Aerosol Face masks Saliva composition Chemical physics |
| Zdroj: | Environmental Research Environmental Research, Elsevier, 2022, 204, pp.112072. ⟨10.1016/j.envres.2021.112072⟩ Environmental Research, 2022, 204, pp.112072. ⟨10.1016/j.envres.2021.112072⟩ |
| ISSN: | 1096-0953 0013-9351 |
| Popis: | To control the evolution of a pandemic such as COVID-19, knowing the conditions under which the pathogen is being transmitted represents a critical issue, especially when implementing protection strategies like social distancing and face masks wearing. For viruses and bacteria that spread via airborne and/or droplet pathways, this requires understanding how saliva droplets evolve over time after their expulsion by speaking or coughing. Within this context, the transition from saliva droplets to solid residues, due to water evaporation, is studied here both experimentally, considering the saliva from 5 men and 5 women, and via numerical modeling to accurately predict the dynamics of this process. The model assumes saliva to be a binary water/salt mixture and is validated against experimental results using saliva droplets that are suspended in an ultrasound levitator. We demonstrate that droplets with an initial diameter smaller than 21 μm will produce a solid residue that would be considered an aerosol of |
| Databáze: | OpenAIRE |
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