Driven drops with contact line damping

A water droplet placed on a hydrophobic plate is driven by plate-normal oscillations. Resulting droplet motions are largely inviscid, having Reynolds number >100 (Ohnesorge ~0.002). We are interested in isolating the effective damping, sometimes called Davis dissipation, owing to a moving contact line that is not completely mobile. In this talk, we report energy budgets as influenced by contact angle -- contact line speed relationships for variously prepared surfaces.