Quantitative analysis of oscillation effect on the bubble generation by drop impact
Date Issued
2010
Date
2010
Author(s)
Kuan, Chen-Chi
Abstract
The impact of a droplet on a liquid pool can result in different fantastic phenomena. Many investigations have been conducted since decades; however, none has been studied for the effects of oscillating drop on the large bubble induced by the impacting droplet since Worthington (1908).
In the present study, a newest improved quantitative tracking method has been used to analyze the formation and cavity dynamics of big floating bubbles and large bubbles generated by the drop impacting onto deep liquid pool has been experimentally studied and analyzed. Effects of impact velocity, drop size have been investigated and discussed. And it will to understand more deeply about the corresponding relations of those sequential events of drop impact dynamics.
Furthermore, two geometry parameter oscillation parameters sharpness-ratio and offset-ratio of the free-falling droplet before impact and Weber number have been found to be the most important controlling parameters. And new characteristic regimes of large bubble area in the V (impact velocity)-d (diameter of droplet) map have been edited. It have been further investigated and analyzed in this thesis.
Subjects
quantitative drop impact, floating bubble, large bubble, cavity dynamics, drop oscillation parameter, sequential drop dynamics
Type
thesis
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