Figure 3.

Simulation of a bidisperse colloidal suspension in a fast evaporation drop (). The diameters of the small and large colloids are , respectively. The initial colloid volume fractions are and , respectively. (a) Cross-sections of the spherical droplet at various times during drying and the corresponding density distributions of small (cyan) and large (red) colloids. (b) Radial distribution of small (red) and large (blue) colloids at different times. The vertical black lines indicate the position of the receding droplet–air interface at the respective times.