Abstract
A face shield is a type of the personal protective equipment that is used to protect a person’s face from various external hazardous influences—splashes, drops and aerosols, thermal and optical radiation. It is believed that face shields effectively prevent contamination of the mucous membranes of the human body. According to the World Health Organization (WHO) recommendations, social and medical personnel in contact with Covid-19 patients should use similar protective equipment, including protective face shields. In the present work, a 3D mathematical model of the airflow distribution near the cylindrical surface of a face shield was explored. The model is based on a numerical solution of the Navier–Stokes gas dynamics equations. The simulation results are compared with full-scale experiments. A probability model is also considered. Quantitative conclusions are made about the effectiveness of the protective face shields.
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