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How do three-layer surgical masks prevent SARS-CoV-2 aerosol transmission? by Ziyi Han; Lina Wang; Yueyan Liu; Tatleung Chan; Zhandong Shi; Mingzhou Yu is a Engineering article available to read on EtoBox.

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The three-layer surgical mask was recognized by the World Health Organization as an effective-protection tool for reducing SARS-CoV-2 transmission during the COVID-19 pandemic; however, the contribution of each layer of this mask to the particle size–dependent filtration performance resistance remains unclear. Here, both experimental work and numerical simulation were conducted to study the role of each mask layer in particle size–dependent filtration and respiratory resistance. By using scanning electron microscopy images of a commercial three-layer mask, composed of two spun-bond and one melt-blown nonwoven polypropylene fabric layers, four representative models were constructed, in which the computational fluid dynamics of multiphase flow were performed. The pressure drop of all models under different flow conditions was measured next. Numerical simulation was then verified by comparing the experimental results in the present study and other theoretical works. The filtration efficiency of the spun-bond polypropylene nonwoven fabric layer was much lower than that of the melt-blown nonwoven polypropylene fabric layer for the particle diameter in the range of 0.1–2.0 μm. Both the s

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Author

Ziyi Han; Lina Wang; Yueyan Liu; Tatleung Chan; Zhandong Shi; Mingzhou Yu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)