Figure 11.

(a) Side- and bottom-view images of two coalescing water drops on superhydrophobic substrate (θ = 162–165°). (b) Linear scale pot of r(t) for drops of different sizes. Inset: Superposition of the data sets when normalized with t_c$=\sqrt{{\rho }_d{R}^3/\sigma }$. Adapted with permission from [19].