A Numerical Study on Hollow Droplets Impact onto a Solid Substrate

Abstract:

A numerical model using VOF method is developed to describe the phenomenon of a hollow droplet impact on a flat surface including spreading, retardation, recoil and first and secondary break up. The proposed model is verified by literature experiments. Some new hydrodynamic characteristics have been found. The mechanism of central counter jet is explored according to pressure distribution and velocity vectors inside droplet. The relationship between impact features of droplet and deposition parameters is highlighted. In order to investigate the heat transfer rate at the gas-liquid interface, air entrapment and gas cavity are discussed.

• Periodical: Advanced Materials Research (Volume 852)
• Pages: 501-505
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.852.501
• Online since: January 2014
• Authors: Da Shu Li, Xing Qi Qiu, Zhi Wei Zheng
• Keywords: Air Entrapment, Cavity Gas Entrapment, Counter Jet, Hollow Droplet, Numerical Simulation, Plasma Spraying

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