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<p>Thermophysical processes influencing the spread of respiratory epidemics on drying (or freezing) of an aerosol containing a virus of about 100 nm in size have been identified for the first time. It is shown that sufficiently rapid drying or freezing of a micron amount of aerosol produced inside a sick person leads to an increase in the Laplace pressure, which mechanically destroys the virus. It has been established that the characteristic time of phase transitions does not exceed 3 ms of a micron amount of aerosol and that the most favorable conditions for the survival of the virus in an aerosol are the air temperature held near zero Celsius and high air humidity, ensuring a sufficiently long existence of the aerosol and, consequently, of the virus inside it.</p>

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Phase Transitions in Aerosols and Spreading of Respiratory Epidemics

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • P. S. Grinchuk,
  • S. M. Danilova-Tret’yak,
  • S. P. Fisenko

摘要

Thermophysical processes influencing the spread of respiratory epidemics on drying (or freezing) of an aerosol containing a virus of about 100 nm in size have been identified for the first time. It is shown that sufficiently rapid drying or freezing of a micron amount of aerosol produced inside a sick person leads to an increase in the Laplace pressure, which mechanically destroys the virus. It has been established that the characteristic time of phase transitions does not exceed 3 ms of a micron amount of aerosol and that the most favorable conditions for the survival of the virus in an aerosol are the air temperature held near zero Celsius and high air humidity, ensuring a sufficiently long existence of the aerosol and, consequently, of the virus inside it.