Research: 90 percent of particles dispersed in the lesson taught by a Covid-19 teacher


In a study conducted days before the opening of the schools, it was found that 90 percent of the particles remained in the area, even if good ventilation was found in a classroom where a Covid-19 teacher was teaching for 50 minutes.

A study in the United States (US) found that good ventilation in confined spaces, such as schools, classrooms, and offices, reduces Coda-19 virus retention by only 10 percent.

According to the research, although there is a good air flow in a closed area, the coronavirus continues to cling.

University of Minnesota scientists conducted a research in the classroom environment for schools planned to open in August due to quarantine, and conducted a study on the speed of Covid-19’s spread in closed and crowded places.

Research assistants have prepared a simulation to what extent an infected person can infect Covid-19 after actions such as talking, coughing, sneezing or moving indoors. Commonly used factors such as ventilators and air conditioners were also included in the simulation.

Good ventilation reduces the effect of the virus by 10 percent, the virus clings to the walls

Accordingly, having a good ventilation system indoors reduces the effect of the virus by only 10 percent. In the simulation, while talking to a teacher assumed to have a coronavirus for 50 minutes, it was found that most of the virus particles were suspended in the air, and some were attached to the walls of the classroom under the influence of air circulation.

Research Engineer Associate Professor Doctor Sua Yang states that the flow caused by ventilation causes hot spots and eddies, and the virus is mostly suspended in these eddies. “The particles of the virus move under the influence of the current and stick to the walls. However, they stay largely on the vortexes formed in the air. Therefore, the current created by the ventilation cannot be said to throw the virus out of the closed spaces, its effect is only 10 percent.” Yang said. he spoke.

The position of the teacher in the classroom is important

in the study It was determined that the positioning of the teacher next to the air vents that occurred while teaching was reducing the spread of the virus to the class. According to the results, it has been revealed that the most important factor that can reduce the spread of the virus in indoor spaces is the correct positioning of the interior design and ventilation.

Dr. Sua Yang states that, with the opening of schools and normalization, the managers working in places such as offices, cinemas, theaters, shops and shopping centers will consult more and more, “If your air conditioner is in a good position and works well, people in the place are scattered in a proper way.” a much safer environment will be provided in terms of viruses and epidemics. “


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