Cross-infection risk between two people in different temperature surroundings studied by aerosol dynamics

Peter V. Nielsen, Chen Zhang, Kirstine Meyer Frandsen, Rasmus Lund Jensen, Patrick Andersen Hundevad, Simon Madsen, Tonje Luckenwald, Najim Popalzai, Yuguo Li, Hua Qian, Chunwen Xu, Li Liu

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Abstract

The spreading of a disease largely occurs in buildings or in collective transport. The microenvironment flow processes around people contribute to the cross-infection risk, for example when two persons are standing close to each other. The cross-infection risk is also dependent on the macro-environment e.g. distribution of velocity and turbulence in the room, particularly when the background airflow is strong. The surrounding temperature and the presence of a vertical temperature gradient can also modify airflows in the microenvironment and subsequently influence the cross-infection risk. This work is based on a fully mixed flow in a room without a vertical temperature gradient, considering different room temperatures.

Exhalation flow and aerosol distribution are studied by smoke experiments and the cross-infection risk is expressed as concentration in the susceptible breathing zone normalized by the concentration in the room.
Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Building Energy and Environment
EditorsLiangzhu Leon Wang, Hua Ge, Zhiqiang John Zhai, Mohamed Ouf, Dahai Qi, Chanjuan Sun, Dengjia Wang
Number of pages8
PublisherSpringer
Publication dateSept 2023
Pages1707-1714
ISBN (Print)978-981-19-9821-8 (Hardcover), 978-981-19-9823-2 (Softcover)
Publication statusPublished - Sept 2023
Event5th International Conference on Building Energy and Environment (COBEE 2022) - Montreal, Canada
Duration: 25 Jul 202229 Jul 2022
Conference number: 5

Conference

Conference5th International Conference on Building Energy and Environment (COBEE 2022)
Number5
Country/TerritoryCanada
CityMontreal
Period25/07/202229/07/2022
SeriesEnvironmental Science & Engineering
VolumePrint
ISSN1863-5520
SeriesEnvironmental Science and Engineering
VolumeElectronic
ISSN1863-5539

Bibliographical note

Copyright Information
The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023

Keywords

  • Airborne cross infection
  • Aerosol dynamic
  • Aerosol experiments
  • Smoke experiment
  • COVID-19
  • Pandemics
  • Epidemics

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