An Experimental Investigation of the Flow Structure on a Face Mannequin With / Without a Face Shield

This study investigated experimentally the flow regime with a face shield on mannequin placed at different distances (L=50 cm and L=150 to source of flow), i.e., perpendicular channel or an angle 10°, through PIV (Particle Imaging Velocimetry) method along dye experiments, based which injector were positioned conduct tests. As result instantaneous velocity vectors magnitude data obtained, structure around was examined in detail. The revealed that released respiratory tract hit eye area experiments performed without using shield, yet, emerged while talking close distance directed from lower part towards neck jaw but protected compared case shield. It observed lost its energy when it first left source, down area. Positioning 10° turned out be less protective than positioning channel, due being mouth effect angle.