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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-472-4

ISBN Online: 978-1-56700-471-7

3rd Thermal and Fluids Engineering Conference (TFEC)
March, 4–7, 2018, Fort Lauderdale, FL, USA

DROPLET DEFORMATION AFTER IMPACT ON CYLINDRICAL OUTER SURFACE

Get access (open in a dialog) pages 959-967
DOI: 10.1615/TFEC2018.fip.022287

Resumo

Three-dimensional numerical simulation of the droplet impacting on outer cylindrical surface is carried out. The droplet deformation characteristics are analyzed and the effects of the impact speed, the contact angle and the curvature ratio are investigated as well. The results show that increasing contact angle, spreading factor decrease, and the time to reach the maximum spreading reduce. When the contact angle is less than 60°,which is benefit to spread, the droplet can overcome the barrier of surface tension and rupture in the centre. When the contact angle is more than 90°, which is not conducive to spread, the droplet rebounds partially or completely. With decreasing of the curvature ratio, the spreading factor increase both busbar and directrix directions. When the curvature ratio is more than 0.5,droplet retracts slower observably along directrix directions.