PHYSICAL ADSORPTION NEAR AN OBLIQUE CORNER

We study physical adsorption of multilayer liquid films in the vicinity of an oblique corner formed by the intersection of two planar surfaces. This is a simplified example of the geometry in a porous medium. The film-vapor interface is determined by minimizing the free energy of the system. The excess coverage is studied as a function of film thickness d and the corner angle 2. Numerical results are presented in terms of a characteristic (capillary) length scale , which divides the behavior into two thickness regimes. Surface tension dominates if d, but has a negligible effect if d. © 1990 The American Physical Society.