Wind- and gravity-forced drop depinning
Edward B. White, Jason A. Schmucker
Abstract
Contact-angle hysteresis enables drops to pin to surfaces in the presence of wind or gravity forcing. Under what combined forcing conditions do drops depin and run back along a surface? On noninclined surfaces, drops depin at a constant critical Weber number across a wide range of Bond numbers. On inclined surfaces, two regimes of wind- and gravity-dominated forcing are observed, but a simple correlation may still describe critical depinning conditions.
Topics & Concepts
Forcing (mathematics)Drop (telecommunication)MechanicsHysteresisMaterials scienceConstant (computer programming)Range (aeronautics)Condensed matter physicsPhysicsDrop impactCritical point (mathematics)Weber numberSimple (philosophy)Surface Modification and SuperhydrophobicityFluid Dynamics and Heat TransferNanomaterials and Printing Technologies