Interfacial instability due to elastic stratification in concentric coextrusion of two viscoelastic fluids

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Abstract

The linear stability of coextrusion of two viscoelastic fluids in a circular pipe is analyzed in the long wave limit. An interfacial instability due to elastic stratification is found. The effects of viscosity ratio, volume ratio and elasticity ratio on this elastic instability are also discussed.

Original languageEnglish (US)
Pages (from-to)155-175
Number of pages21
JournalJournal of Non-Newtonian Fluid Mechanics
Volume40
Issue number2
DOIs
Publication statusPublished - Sep 16 1991
Externally publishedYes

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Keywords

  • coextrusion
  • interfacial instability
  • viscoelastic fluids

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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