Dynamics of perfectly wetting drops under gravity.

We study the dynamics of small droplets of polydimethylsiloxane silicone oil on a vertical, perfectly wetting, silicon wafer. Interference videomicroscopy allows us to capture the dynamics of these droplets. We use droplets with a volumes typically ranging from 100 t o500nl (viscosities from 10 to 1000 cSt) to understand long time derivations from classical solutions.