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)
DROPLET DEFORMATION AFTER IMPACT ON CYLINDRICAL OUTER SURFACE
Abstract
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.