Fig. 3: Liquid profile, geometrical parameters and evolution of the liquid film.
From: Polygonal non-wetting droplets on microtextured surfaces
a Schematic illustration of the block (red arrow) and moving (green arrow) directions of the liquid profile from the side view. Rb,1 and Rm,1 denote the curvature radii of the red and green curves, respectively. b Close-up showing the liquid profile with relevant geometrical parameters. b denotes the spacing of the pillar, and H the separation between the upper glass plate and the pillar. θA and θA,b denote the advancing contact angles along the moving and block directions, respectively. θA,g denotes the advancing contact of the glass plate. c Schematic illustration of the principal curvature radii Rb,2 and Rm,2 of the liquid-vapour menisci from the top view. d Evolution of the hexagonal droplet pattern with H and Rm,2. The dots are experimental data with different volumes, and the red line is obtained using the best fit (Rm,2/H ≈ 3.7). Insets showing the appearances of the surface and the representative liquid patterns (corresponding to the yellow dots). e The variations of Rm,2/H as a function of f for various cross-sections of the pillars and arrangements of the arrays (see insets), as well as the droplet shape. The dots are experimental data and the red curve represents the theoretical results obtained by Eq. (3). Source data are provided as a Source Data file.
