Deformation behavior of liquid droplet in shock-induced atomization

The purpose of this study is to clarify the deformation behavior characteristics of a single droplet in the high Weber number region corresponding to catastrophic breakup, depending on the Weber number, and show the relationship between the spread of fragments and their initial deformation behavior. Accordingly, we investigated waves generated from the droplet surface by photographing the deformation behavior of the droplet with high spatio-temporal resolution and the correlations between the Weber number and height and thickness of the parent droplet, center-of-mass movement, and movement of the leading and trailing edges. The results show no significant relationship between the spread of the fragment and its initial deformation behavior. We also measured the wavelength of the wave pattern at the upstream interface of the droplet during a catastrophic breakup. As a result, a relationship between the wavelength of the upstream interface of the droplet and the Weber number was found.