| Using a volume-of-fluid method, we simulate liquid drops impacting at several meters per second, both onto a solid substrate and in a head-on geometry. The boundary condition that the fluid cannot flow through the impact plane controls the early-time impact dynamics. Whether fluid can flow along the impact plane, the difference between the two configurations, is not as important during the early times, but it does become important later. We also quantify when and where the small effects of viscosity and surface tension affect the dominantly inertial impact dynamics. |
