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摘要
En 中文
We study experimentally the behaviour of a drop deposited on a conical fibre. It is shown that for wetting liquids, such a drop spontaneously moves towards the region of lower curvature. The driving force is measured and shown to be a gradient of Laplace pressure, which allows us to characterize the dynamics of these self-propelling drops. We conclude by discussing the efficiency of this device for drying a solid initially coated with a liquid film.
Keyword:
LIQUID-DROPS
THERMOCAPILLARY MIGRATION
THIN CYLINDERS
CONTACT-ANGLE
FIBER
SURFACES
DROPLETS
DYNAMICS
SYSTEMS
SHAPES
