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Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs

The dispersion of cough-generated droplets from a person going up- or downstairs was investigated through a laboratory experiment in a water tunnel. This experiment was carried out with a manikin mounted at inclination angles facing the incoming flow to mimic a person going up or down. Detailed velo...

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Autores principales: Wang, Hongping, Li, Zhaobin, Liu, Yi, Zhu, Lixing, Zhou, Zhideng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AIP Publishing LLC 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8734944/
https://www.ncbi.nlm.nih.gov/pubmed/35003882
http://dx.doi.org/10.1063/5.0073880
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author Wang, Hongping
Li, Zhaobin
Liu, Yi
Zhu, Lixing
Zhou, Zhideng
author_facet Wang, Hongping
Li, Zhaobin
Liu, Yi
Zhu, Lixing
Zhou, Zhideng
author_sort Wang, Hongping
collection PubMed
description The dispersion of cough-generated droplets from a person going up- or downstairs was investigated through a laboratory experiment in a water tunnel. This experiment was carried out with a manikin mounted at inclination angles facing the incoming flow to mimic a person going up or down. Detailed velocity measurements and flow visualization were conducted in the water tunnel experiments. To investigate the influence of the initial position on the motion of particles, a virtual particle approach was adopted to simulate the dispersion of particles using the measured velocity field. Particle clustering, which is caused by the unsteadiness of the flow, was observed in both flow visualization and virtual particle simulation. For the case of going upstairs, particles are concentrated below the person’s shoulder and move downward with a short travel distance. For the case of going downstairs, particles dispersing over the person’s head advect over for a long distance. We also found that the motion of the particles is closely related to the initial position. According to the results in this study, suggestions for the prevention of respiratory infectious disease are made.
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spelling pubmed-87349442022-01-07 Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs Wang, Hongping Li, Zhaobin Liu, Yi Zhu, Lixing Zhou, Zhideng AIP Adv Regular Articles The dispersion of cough-generated droplets from a person going up- or downstairs was investigated through a laboratory experiment in a water tunnel. This experiment was carried out with a manikin mounted at inclination angles facing the incoming flow to mimic a person going up or down. Detailed velocity measurements and flow visualization were conducted in the water tunnel experiments. To investigate the influence of the initial position on the motion of particles, a virtual particle approach was adopted to simulate the dispersion of particles using the measured velocity field. Particle clustering, which is caused by the unsteadiness of the flow, was observed in both flow visualization and virtual particle simulation. For the case of going upstairs, particles are concentrated below the person’s shoulder and move downward with a short travel distance. For the case of going downstairs, particles dispersing over the person’s head advect over for a long distance. We also found that the motion of the particles is closely related to the initial position. According to the results in this study, suggestions for the prevention of respiratory infectious disease are made. AIP Publishing LLC 2022-01-03 /pmc/articles/PMC8734944/ /pubmed/35003882 http://dx.doi.org/10.1063/5.0073880 Text en © 2022 Author(s). https://creativecommons.org/licenses/by/4.0/All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Regular Articles
Wang, Hongping
Li, Zhaobin
Liu, Yi
Zhu, Lixing
Zhou, Zhideng
Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title_full Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title_fullStr Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title_full_unstemmed Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title_short Experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
title_sort experimental study of the dispersion of cough-generated droplets from a person going up- or downstairs
topic Regular Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8734944/
https://www.ncbi.nlm.nih.gov/pubmed/35003882
http://dx.doi.org/10.1063/5.0073880
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