Dynamic Behavior of Liquid Mercury Droplets Colliding with a Solid Surface

Abstract:

The dynamic behavior of liquid mercury and water droplets colliding with a solid surface were precisely examined as part of a fundamental study for investigating the behavior of a liquid microjet emitted as a result of a cavitation bubble collapse in mercury. Liquid droplets were collided with a quartz plate by the free-fall method, and the colliding and spreading behaviors of the liquids were observed using a high-speed video camera. In the case of mercury droplets, the spreading, recoiling, and jump-up phenomena resulting from the high surface tension of mercury were observed. The ratio of the maximum spreading diameter, D_max, to the initial droplet diameter, D₀, was investigated by parametrically changing the colliding velocity and tilt-angle of the quartz plate. The result showed that the ratio D_max/D₀ was well correlated with the Weber number, which is defined as a function of the colliding velocity and surface tension, independent of the liquid considered.

• Periodical: Applied Mechanics and Materials (Volume 566)
• Pages: 391-396
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.566.391
• Online since: June 2014
• Authors: Takashi Naoe*, Masatoshi Futakawa
• Keywords: Contact Angle, Droplet Collision, High Speed Photography, Liquid Mercury

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