Experimental Study on the Effect of Multiple Droplet Frequency and Weber Number to Spreading Ratio of Multiple Droplets on a Horizontal Surface
Penulis/Author
Indro Pranoto, Ph.D. (1); Prof. Dr. Eng. Ir. Deendarlianto, S.T., M.Eng. (2); Prof. Ir. Samsul Kamal, M.Sc., Ph.D (3)
Tanggal/Date
2016
Abstrak/Abstract
In this study, the phenomena of multiple droplet
impingements are investigated and observed experimentally. A
high-speed camera was used to capture sequential images of
multiple droplet impingements. Image processing technique was
used to analyze the images from a high-speed camera. The effect
of droplet frequency and Weber number to spreading ratio are
investigated. The result of this study shows that frequency of
multiple droplets has no significant effect to spreading ratio in
the first drop. It is found that frequency of the multiple droplets
causes a wider spreading ratio in the second drop. On a lower
Weber number and lower surface temperature, the spreading
ratio is smaller than on a higher weber number. It is also found
that surface temperature has a strong correlation with the
spreading ratio. It was also found that at a higher surface
temperature, the spreading ratio of a droplet is relatively
unstable in the function of time.
