Consider a cylindrical droplet sitting on the lower surface of a simulation box, between two confining walls, as shown in Fig. . Let the droplet have height H and the contact angle be θ, and consider two planes AA ′ and BB ′ extending across the simulation box as indicated in Fig. , with the latter intersecting the droplet at its maximum height. The force across AA ′ will be p 1 L z -2γ s1 and similarly the force across BB ′ will be p