Silicone oil droplet spreading inside hypocycle and epicycle grooves

<p>Chapter 2 : Droplet spreading inside curved grooves. Figure 2.3 (c) <br>Two videos of a red-dyed silicone oil droplet spreading within (top) a hypocycle groove and (bottom) a epicycle groove. The radius of the groove is the same, R = 1.37 mm, and the volume of the droplet is the same, 5 &micro;l. The numerically found contour is in black, it allows to measure to position at both side of the droplet, and therefore the speading over time. <br>Real time video.</p>