High-Speed Binary Droplet Collision with Differenthnesorge number
Date Issued
2008
Date
2008
Author(s)
Tseng, Yu-Jen
Abstract
In this study, we investigate the phenomena of droplet-droplet collision with different Ohnesorge number in a head-on collision condition, i.e., the impact number is zero. It aims at observing the phenomena of droplet collision and discussing the physical phenomena of that under a head-on situation. In addition, we try to find a different way from the original one to generate high-speed droplets. Instead of using a compressor to inject a liquid jet and then cutting it off into several droplets by a rotating disk, we simply let the accelerating air move through a tube and carry the droplets into high speed.ne of the main goals of this experiment is to take clear photographs whether in lower Weber number or in higher one. The other is to achieve a relative high Weber number about 5100. On the other hand, we discuss how Ohnesorge number influences the droplet collision. Break-up phenomenon is observed in high-speed droplet collision. The Z-We and We-W figures which illustrate the trends of break-up diameter, break-up boundary, and splattering boundary are also obtained in this thesis, where Z indicates the Ohnesorge number and W is the non-dimensional parameter of the diameter of droplet with respect to the break-up diameter.eywords: droplet collision, high-speed droplet, impact number, Ohnesorge number, Webber number
Subjects
droplet collision
high-speed droplet
impact number
Ohnesorge number
Webber number
Type
thesis
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