(color online) Droplets on spherical substrates of different curvature radii showing curvature selectivity through Ostwald ripening-like transport. (a) The droplet of r_S = 15 on the flat substrate and the convex colloid (R = 30). The snapshots, from left to right, correspond to the time steps of 0, 6000, 14000, 19000, 21000, and 21800. (b) The droplet of r_S = 15 inside the spherical cavity (R = 40) and on the flat substrate. The snapshots correspond to the time steps of 0, 900, 18000, 28000, 37000, and 40000. (c) During a condensation process, the transport between condensing droplets on a rough substrate having parts of different local curvature (the flat region and the convex and concave regions with a curvature radius of 40). The snapshots correspond to the time steps of 0, 2200, 7400, and 13800. In the figure, the solid surface has a wettability of θ_Y = 11π/18.