Instability of a polymeric thread

J. Eggers*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)

Abstract

When a liquid containing a dilute solution of long, flexible polymers breaks up under the action of surface tension, it forms long threads of nearly uniform thickness. However, at a thickness in the order of microns, the thread becomes unstable to the formation of a non-uniform "blistering" pattern: tiny drops separated by threads of highly concentrated polymer solution.We show that standardmodels for the coupling between stress and polymer concentration lead to a linear instability, which exhibits very strong transient growth of the free surface perturbation. A high concentration of polymer remains in the thread part of the structure.

Original languageEnglish
Article number033106
JournalPhysics of Fluids
Volume26
Issue number3
DOIs
Publication statusPublished - 31 Mar 2014

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