When the droplet diameter decreases the equilibrium evaporation stage
Fig. 8. Variations of normalized squared droplet diameter and droplet temperature with the normalized time for one- and two- component droplets at T∞ = 443 K.Figure optionsDownload full-size imageDownload as PowerPoint slide
In this case the ambient temperature is T∞ = 443 K, the ambient pressure is p = 0.1 MPa. The initial volume of the droplets is 1 μL.
The general 6 his behavior of the benzyl azides-hexadecane binary droplet is similar to that of the dodecane–hexadecane binary droplet. Both curves show two-staged evaporation of a binary droplet. After a finite heating-up period, the variation of square of droplet diameter becomes approximately linear with time, while tropic hormone keeps d2-law at the last stage.
As Fig. 8 shows, during the heating-up stage Δτ1Δτ1, the heat transferred from ambient is utilized mainly to increase the droplet temperature and the density of the droplet decreases with the increase of the droplet temperature, which leads to the droplet thermal expansion. Moreover, the temperature increasing rate of the benzyl azides-hexadecane blend droplet is basically the same as that of the dodecane–hexadecane blend droplet. But the Δτbah6Δτbah6 is little shorter than the Δτdh6Δτdh6.