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Effect of transient pinning on stability of drops sitting on an inclined plane

Viatcheslav V. Berejnov, Robert E. Thorne

physics.flu-dynarXiv:physics/0609208

Abstract

We report on new instabilities of the quasi-static equilibrium of water drops pinned by a hydrophobic inclined substrate. The contact line of a statically pinned drop exhibits three transitions of partial depinning: depinning of the advancing and receding parts of the contact line and depinning of the entire contact line leading to the drop's translational motion. We find a region of parameters where the classical Macdougall-Ockrent-Frenkel approach fails to estimate the critical volume of the statically pinned inclined drop.

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