Wet Adhesion of Soap Bubble Bridge between Two Curved Surfaces

Figure 2

The diagram of pressure versus product of pressure and volume. (a) The different shapes of rigid surfaces and (b) the different wetting radii for concave rigid surfaces. The green dot in Figure 2(a) denotes the contact between two rigid convex surfaces. And the red dot in Figure 2(b) denotes a state of Laplace pressure and wetting radius for .

(a)

(b)