Formation of beads-on-a-string structures during break-up of viscoelastic filaments
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Author(s)
Bhat, Pardeep P.
Appathurai, Santosh
Harris, Michael T.
Pasquali, Matteo
McKinley, Gareth H.
Basaran, Osman A.
Date Issued
June 2010
Journal
Nature Physics
Publisher
Nature Publishing Group
Citation
Bhat, Pradeep P. et al. “Formation of Beads-on-a-string Structures During Break-up of Viscoelastic Filaments.” Nat Phys 6.8 (2010) : 625-631.
Version
Author's final manuscript
Abstract
Break-up of viscoelastic filaments is pervasive in both nature and technology. If a filament is formed by placing a drop of saliva between a thumb and forefinger and is stretched, the filament’s morphology close to break-up corresponds to beads of several sizes interconnected by slender threads. Although there is general agreement that formation of such beads-on-a-string (BOAS) structures occurs only for viscoelastic fluids, the underlying physics remains unclear and controversial. The physics leading to the formation of BOAS structures is probed by numerical simulation. Computations reveal that viscoelasticity alone does not give rise to a small, satellite bead between two much larger main beads but that inertia is required for its formation. Viscoelasticity, however, enhances the growth of the bead and delays pinch-off, which leads to a relatively long-lived beaded structure. We also show for the first time theoretically that yet smaller, sub-satellite beads can also form as seen in experiments.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1038/nphys1682
