Figure 3
From: Morphing and vectoring impacting droplets by means of wettability-engineered surfaces

Plots of the horizontal restitution coefficient (εx) as a function of We for droplets impacting on hydrophilic arcs on a superhydrophobic background: (a) linear and (b) semi-log scales.
In (a), the fitted curve has the following form: εx = C1We−0.25 + C2 (C1 and C2 are fitting constants). In (b), the slope of the dashed line is −0.25.