Chandra, NK and Sharma, S and Basu, S and Kumar, A (2024) Aerodynamic bag breakup of a polymeric droplet. In: Physical Review Fluids, 9 (11).
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Abstract
The aerodynamic breakup of a polymeric droplet in the bag breakup regime is investigated experimentally and compared with the result of the Newtonian droplet. To understand the effect of liquid elasticity, the Weber number is kept fixed (�15) while the elasticity number is varied in the range of �10-4-10-2. Experiments are performed by allowing a liquid droplet to fall in a horizontal, continuously flowing air stream. It is observed that the initial deformation dynamics of a polymeric droplet is similar to the Newtonian droplet. However, in the later stages, the actual fragmentation of liquid mass is resisted by the presence of polymers. Depending upon the liquid elasticity, fragmentation can be completely inhibited in the timescale of experimental observation. We provide a framework to study this problem, identify the stages where the role of liquid elasticity can be neglected and where it must be considered, and finally, establish a criterion that governs the occurrence or the absence of fragmentation in a specified time period. © 2024 American Physical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physical Review Fluids |
| Publisher: | American Physical Society |
| Additional Information: | The copyright for this article belongs to the author. |
| Keywords: | Aerodynamics, Air streams; Bag breakups; Breakup regimes; Deformation dynamics; Elasticity number; Liquid droplets; Liquid elasticity; Newtonians; Polymeric droplets; Weber numbers, Drop breakup |
| Department/Centre: | Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Mechanical Engineering |
| Date Deposited: | 09 Dec 2024 18:09 |
| Last Modified: | 09 Dec 2024 18:09 |
| URI: | http://eprints.iisc.ac.in/id/eprint/87098 |
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