Figure 2
From: Directional Movement of Droplets in Grooves: Suspended or Immersed?
Relationship between the groove parameters and the droplet resting modes.
(a) Experimental images of water droplets in the V-shaped grooves with various surface wettabilities and cross sectional angles. (b) Relationship between the groove parameters and the droplet resting modes for water, glycerol, kerosene and ethylene glycol droplets. The droplets will be either immersed or suspended in the grooves depending on the combination of θ and β. For β < 2θ-π, the droplets were suspended in the groove center for all the liquids under consideration. The scale bar denotes 1 mm.
