フェイスシールドの形状がくしゃみによる飛沫の吸引抑制に及ぼす影響

抄録

The purpose of this research is to verify the effect of the shape of the upper and lower edges of the shield, designed by the authors to reduce the inflow of droplets into the face shield, using visualization experiments. The research also verifies the validity of the results of the LES analysis performed in the previous research. Two different face shield shapes are used for the verification: one with small plates at the top and bottom of the shield to guide the sneeze flow, including droplets, over the head and under the chin, thus physically inhibiting the flow entering into the shield. The other is a shape with a small plate and a brim at the top and bottom ends. The aim is to prevent the inflow of droplets arriving later by turning the sneeze flow forward, which reaches the shield surface before the droplets. The results indicate that the shape of the upper and lower edges of the shield can be improved to inhibit the generation of entraining flow near the upper and lower edges of the shield, and the amount of droplets entering the inside of the shield can be significantly reduced. These results are in good agreement with the results of the previous LES.