This is a good test problem because it has simple boundary conditions and a simple initial configuration. The appearance of both a vertical and horizontal free surface, however, provides a check on the capability of SOLA-VOF to treat free surfaces that are not single valued with respect to x or y. Results from two calculations are presented in Fig. 7 with the experimental data. In both cases, the mesh consisted of 40 uniformly spaced columns (bx = 0.1) and 22 nonuniformly spaced rows. The smallest by values are located at the bottom of the mesh, where resolution is needed to define the thin leading edge of the advancing water. In the first calculation, the smallest oy was 0.05, while in the second it was 0.025. We see from