Numerical Modeling of Face Shield Protection against a Sneeze

The protection provided by wearing masks has been a guideline worldwide to prevent the risk of COVID-19 infection. current work presents an investigation that analyzes effectiveness face shields as personal protective equipment. To end, multiphase computational fluid dynamic study based on Eulerian–Lagrangian techniques was defined simulate spread droplets produced sneeze. Different scenarios were evaluated where relative humidity, ambient temperature, evaporation, mass transfer, break up, and turbulent dispersion taken into account. saliva human body generates modeled saline solution 8.8 g per 100 mL. In addition, influence wind speed studied with soft breeze 7 km/h moderate 14 km/h. results indicate shield does not provide accurate protection, because only person who is sneezed protected. Moreover, km/h, none exhaled environment hit shield, instead, they deposited onto neck wearer. presence airflow, exceeded safe distance marked WHO. Relative humidity temperature play important role in lifetime droplets.