Climbing constant, second-order correction of Trouton's viscosity, wave speed and delayed die swell for M1

Howard H. Hu, Oliver Riccius, Kang Ping Chen, Mike Arney, Daniel D. Joseph

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Measurements of the wave speed c in M1 imply at fast time λ = υ/ρc2 of relaxation. This and the delayed die-swell measurements suggest that M1 is not very elastic. Extensive and very reliable values of the climbing constants show that M1 has weak normal stresses at the level of STP. The climbing constants plus back-extrapolated values of N1/ γ .2 taken from measurements at two temperatures by Binding, and Walters and Prud'homme lead to values of the two coefficients in the second-order regime of slow flow of M1. This gives us all the constants in the Roscoe formula for the quadratic correction of Trouton's viscosity and also shows us to compute the normal stress ratio - N2/N1 = 0.11, independent of temperature.

Original languageEnglish (US)
Pages (from-to)287-307
Number of pages21
JournalJournal of Non-Newtonian Fluid Mechanics
Volume35
Issue number2-3
DOIs
StatePublished - 1990
Externally publishedYes

Keywords

  • climbing constant
  • delayed die swell
  • extensional viscosity
  • test fluid M1
  • wave speed

ASJC Scopus subject areas

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

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