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

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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 publication5th International Conference on Building Energy and Environment (Cobee 2022)
Publication statusAccepted/In press - 2022
SeriesEnvironmental Science & Engineering


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


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