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Droplet Asymmetric Bouncing on Inclined Superhydrophobic Surfaces
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posted on 2019-07-16, 17:38 authored by Hao Wang, Cong Liu, Haiyang Zhan, Yahua LiuA droplet impacting
on inclined surfaces yields more complex outcomes
than on normal impact and the effect of the inclining angle on the
impact dynamics is still in controversy. Here, we show that a drop
impacting on inclined superhydrophobic surfaces exhibits an asymmetric
rebound with a distinctive spreading and retraction along the lateral
and tangential directions. Meanwhile, there is an obvious contact
time reduction with the increase of the inclining angle and impact
velocity. We demonstrate that the contact time reduction is attributed
to the asymmetric drop spreading and retraction, which endows a fast
drop detachment. Simple analyses are presented to interpret this phenomenon,
which is in a good agreement with the experimental results.