Figure 2
From: Curvature-driven bubbles or droplets on the spiral surface
Migration of a bubble on the concave or convex side of a cantilever sheet with large deflection.
(a) Snapshots of the migration of a bubble on the concave (upper row) or convex (lower row) side of a cantilever sheet. The three subfigures in both of the upper and lower rows correspond to the case that the external force P = 0.26, 0.19 and 0.12 N, respectively. (b) Velocity of the bubble on the concave or convex side of the spiral made of PMMA or PE. The three groups, i.e., lines 1 & 6, lines 2 & 5 and lines 3 & 4 correspond to the case that the external force P = 0.26, 0.19 and 0.12 N, respectively. Solid lines 1, 2, 3 and dash lines 4, 5, 6 correspond to the concave side and convex side, respectively. (c) Linear relationship between the velocity of the bubble and external load.
