FIG. 4.
Comparison of the temporal variation of the normalized diameter of different initial size droplets of pure water with the water-salt solution. The initial temperature of the droplets is 36 °C. The values of the ambient temperature, RH, and wind speed are 30 °C, 0.84, and 2 m/s, respectively. Here, Deq and D0 represent the equivalent and initial diameter of the droplets, respectively. Reproduced with permission from Li et al., “Dispersion of evaporating cough droplets in tropical outdoor environment,” Phys. Fluids 32(11), 113301 (2020).32 Copyright 2020 AIP Publishing.