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Shock-induced aerobreakup of a polymeric droplet

Kumar Chandra, N and Sharma, S and Basu, S and Kumar, A (2023) Shock-induced aerobreakup of a polymeric droplet. In: Journal of Fluid Mechanics, 965 .

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Official URL: https://doi.org/10.1017/jfm.2023.377


Droplet atomization through aerobreakup is omnipresent in various natural and industrial processes. Atomization of Newtonian droplets is a well-studied area; however, non-Newtonian droplets have received less attention despite their being frequently encountered. By subjecting polymeric droplets of different concentrations to the induced airflow behind a moving shock wave, we explore the role of elasticity in modulating the aerobreakup of viscoelastic droplets. Three distinct modes of aerobreakup are identified for a wide range of Weber number and elasticity number variation: these modes are vibrational, shear-induced entrainment and catastrophic breakup modes. Each mode is described as a three-stage process. Stage I is droplet deformation, stage II is the appearance and growth of hydrodynamic instabilities and stage III is the evolution of liquid mass morphology. It is observed that elasticity plays an insignificant role in the first two stages but a dominant role in the final stage. The results are described with the support of adequate mathematical analysis.

Item Type: Journal Article
Publication: Journal of Fluid Mechanics
Publisher: Cambridge University Press
Additional Information: The copyright for this article belongs to the Author.
Keywords: drops and bubbles
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 18 Jul 2023 10:27
Last Modified: 18 Jul 2023 10:27
URI: https://eprints.iisc.ac.in/id/eprint/82459

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