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Coronavirus, how to reduce the spread in school

2020-10-22T06:58:36.855Z


Windows open in the classroom disperse up to 70% of the virus (ANSA)Windows open to disperse up to 70% of virus particles and protective screens in front of the desks to slow their spread: so physicists have calculated how to reduce the circulation of the new coronavirus at school, within the classrooms. The research, published in the journal Physics of Fluids, is due to the American University of New Mexico. The study of the transport of aerosols and droplets of


Windows open to disperse up to 70% of virus particles and protective screens in front of the desks to slow their spread: so physicists have calculated how to reduce the circulation of the new coronavirus at school, within the classrooms.

The research, published in the journal Physics of Fluids, is due to the American University of New Mexico.

The study of the transport of aerosols and droplets of saliva within closed environments can help establish effective measures to counter the spread of the Sars-CoV-2 virus.

One of the most important environments for gaining a quick understanding of the spread of virus particles, physicists note, is the classroom.

Researchers used a fluid behavior model to explore aerosol transport within an air-conditioned classroom.

It was found that the distribution of the aerosol inside the room is not uniform, due to the air conditioning and the position of the source and that, said one of the authors, Khaled Talaat, "the particles can be transmitted by a student. to the desks or clothes of other students, even if they are up to 2.4 meters away ".

According to Talaat, "the position of the student in the classroom affects the likelihood of transmitting particles to others and receiving them".

However, it was found that "almost 70% of the particles leave the system when the windows are open".

In addition, the expert added, the research shows that "air conditioning removes up to 50% of the particles released during exhalation and conversation, but the rest settles on surfaces inside the room and can re-enter circulation. ".

As a result, research also highlights the importance of using effective filtration and sterilization systems in air conditioners.

The study also shows that even the protective screens placed in front of the benches significantly reduce the transmission of particles from one student to another, because explained Talaat "they influence the circulation of the air flow near the source, making the trajectories of particles change. ".

Source: ansa

All tech articles on 2020-10-22

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