Hyperbolicity and change of type in steady co-extrusion flow of upper-convected Maxwell fluids

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Abstract

The linearized equations governing the steady axisymmetric co-extrusion flow of two upper-convected Maxwell fluids through a circular die are studied and conditions are found under which the vorticity equation can change its type from elliptic to hyperbolic in the core and the annulus regions.

Original languageEnglish (US)
Pages (from-to)157-167
Number of pages11
JournalJournal of Non-Newtonian Fluid Mechanics
Volume47
Issue numberC
DOIs
StatePublished - Jun 1993

Keywords

  • change of type
  • co-extrusion
  • delayed die swell
  • hyperbolicity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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