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Iterated Stretching and Multiple Beads-on-a-String Phenomena in Dilute Solutions of Highly-Extensible Flexible Polymers

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dc.contributor.author Oliveira, Monica S. N.
dc.contributor.author McKinley, Gareth H.
dc.date.accessioned 2005-04-13T02:27:24Z
dc.date.available 2005-04-13T02:27:24Z
dc.date.issued 2005-04-13T02:27:24Z
dc.identifier.uri http://hdl.handle.net/1721.1/16532
dc.description Preprint submitted to Phys. Fluids (Letters) en
dc.description.abstract The dynamics of elastocapillary thinning in high molecular weight polymer solutions are re-examined using high-speed digital video microscopy. At long times, the evolution of the viscoelastic thread deviates from self-similar exponential decay and competition of elastic, capillary and inertial forces leads to the formation of a periodic array of beads connected by axially-uniform ligaments. This configuration is itself unstable and successive instabilities propagate from the necks connecting the beads and ligaments. This iterated process results in the development of multiple generations of beads in agreement with predictions of Chang et al.1, although experiments yield a different recursion relation between successive generations. At long times, finite extensibility truncates the iterated instability and axial translation of the bead arrays along the interconnecting threads leads to progressive coalescence before rupture of the fluid column. en
dc.description.sponsorship NSF, Fundação para Ciência e Tecnologia (Portugal) en
dc.format.extent 2382597 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartofseries 05-P-01;
dc.subject elastocapillary en
dc.subject beads on a string en
dc.subject PEO en
dc.subject extensional viscosity en
dc.title Iterated Stretching and Multiple Beads-on-a-String Phenomena in Dilute Solutions of Highly-Extensible Flexible Polymers en
dc.type Preprint en


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