On the depinning of a drop of partially wetting liquid on a rotating cylinder

Details On the depinning of a drop of partially wetting liquid on a rotating cylinder On the depinning of a drop of partially wetting liquid on a rotating cylinder

2010-10-14

arxiv.org/abs/1010.2920v1

Physics

Fluid Dynamics

Scientific paper

We discuss the analogy of the behaviour of films and drops of liquid on a rotating horizontal cylinder on the one hand and substrates with regular one-dimensional wettability patterns on the other hand. Based on the similarity between the respective governing long-wave equations we show that a drop of partially wetting liquid on a rotating cylinder undergoes a depinning transition when the rotation speed is increased. The transition occurs via a sniper bifurcation as in a recently described scenario for drops depinning on heterogeneous substrates.

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