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Figure 1

From: Directional Movement of Droplets in Grooves: Suspended or Immersed?

Figure 1

Schematic diagram of droplets in different resting modes.

(a) The droplet immersed in the groove bottom when β > 2θ-π. (b) Droplet in between the immersed and suspended modes, as indicated by the fact that H = r. (c), Droplet suspended in the groove center when β < 2θ-π. Two meniscuses formed for case c, where θu and θd stand for the local contact angle of the upper and lower meniscuses and θu = θd = θ when the droplet is in the stable SU state.

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