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Modelling the direct virus exposure risk associated with respiratory events

Wang, Jietuo (author)
Università Degli Studi di Padova,University of Padua
Dalla Barba, Federico (author)
Università Degli Studi di Padova,University of Padua
Roccon, Alessio (author)
Technische Universität Wien,Vienna University of Technology
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Sardina, Gaetano, 1982 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Soldati, Alfredo (author)
Technische Universität Wien,Vienna University of Technology
Picano, Francesco (author)
Università Degli Studi di Padova,University of Padua
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 (creator_code:org_t)
2022-01-12
2022
English.
In: Journal of the Royal Society Interface. - : The Royal Society. - 1742-5689 .- 1742-5662. ; 19:186, s. 20210819-20210819
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The outbreak of the COVID-19 pandemic highlighted the importance of accurately modelling the pathogen transmission via droplets and aerosols emitted while speaking, coughing and sneezing. In this work, we present an effective model for assessing the direct contagion risk associated with these pathogen-laden droplets. In particular, using the most recent studies on multi-phase flow physics, we develop an effective yet simple framework capable of predicting the infection risk associated with different respiratory activities in different ambient conditions. We start by describing the math- ematical framework and benchmarking the model predictions against well-assessed literature results. Then, we provide a systematic assessment of the effects of physical distancing and face coverings on the direct infection risk. The present results indicate that the risk of infection is vastly impacted by the ambient conditions and the type of respiratory activity, suggesting the non-existence of a universal safe distance. Meanwhile, wearing face masks provides excellent protection, effectively limiting the transmission of pathogens even at short physical distances, i.e. 1 m.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)

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