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Breakup Process of Cylindrical Viscous Liquid Specimens after a Strong Explosion in the Core

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Title: Breakup Process of Cylindrical Viscous Liquid Specimens after a Strong Explosion in the Core
Author(s): Bang BH; Ahn CS; Kim DY; Lee JG; Kim HM; Jeong JT; Yoon WS; Al-Deyab SS; Yoo JH; Yoon SS; Yarin AL
Abstract: Basic understanding and theoretical description of the expansion and breakup of cylindrical specimens of Newtonian viscous liquid after an explosion of an explosive material in the core are aimed in this work along with the experimental investigation of the discovered phenomena. The unperturbed motion is considered first, and then supplemented by the perturbation growth pattern in the linear approximation. It is shown that a special non-trivial case of the Rayleigh-Taylor instability sets in being triggered by the gas pressure differential between the inner and outer surfaces of the specimens. The spectrum of the growing perturbation waves is established, as well as the growth rate found, and the debris sizes evaluated. An experimental study is undertaken and both the numerical and analytical solutions developed are compared with the experimental data. A good agreement between the theory and experiment is revealed. It is shown that the debris size λ, the parameter most important practically, scales with the explosion energy E as λ ∼ E −1/2 . Another practically important parameter, the number of fingers N measured in the experiments was within 6%-9% from the values predicted numerically. Moreover, N in the experiments and numerical predictions followed the scaling law predicted theoretically, N ∼ m 1/2 e, with me being the explosive mass.
Issue Date: 2016-09
Publisher: AIP Publishing
Citation Info: Bang, B. H., Ahn, C. S., Kim, D. Y., Lee, J. G., Kim, H. M., Jeong, J. T., Yoon, W. S., Al-Deyab, S. S., Yoo, J. H., Yoon, S. S. and Yarin, A. L. Breakup Process of Cylindrical Viscous Liquid Specimens after a Strong Explosion in the Core. Physics of Fluids. 2016. 28(9). doi: 10.1063/1.4962409.
Type: Article
Description: This is a non-final version of an article published in final form in Bang, B. H., Ahn, C. S., Kim, D. Y., Lee, J. G., Kim, H. M., Jeong, J. T., Yoon, W. S., Al-Deyab, S. S., Yoo, J. H., Yoon, S. S. and Yarin, A.L. Breakup process of cylindrical viscous liquid specimens after a strong explosion in the core. Physics of Fluids. 2016. 28(9). doi: 10.1063/1.4962409.
URI: http://hdl.handle.net/10027/21428
ISSN: 1070-6631
Sponsor: This research was mainly supported by Agency for Defense Development (Contract No. UD140051GD). This research was also supported by COMPA funded by the Ministry of Science, ICT and Future Planning (MSIP).
Date Available in INDIGO: 2017-09-20
 

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