Fig. 2: Displacement of the contact line and the drop.
From: Steerable drops on heated concentric microgroove arrays
a, b Variation of contact line length ratio K of an impinging drop on concentric microgroove arrays (r = d/4) on the left (red) and right (black) sides under We = 16.9 at T = 250 and 350 °C, respectively. The insets in a, b represent the side view of maximum spreading. c Lateral displacements Δl of bouncing drops as a function of temperature under various Weber numbers. A positive Δl, i.e., ΔlL, indicates that drops rebound towards the center of curvature, while a negative one, i.e., ΔlR, towards the opposite direction. The insets show the recoiling of impacting drops shortly after they reach the maximum spreading at different boiling states. The error bars of the data in a–c denote the standard deviation of three measurements. Source data are provided as a Source Data file.
