Rheologica Acta

, Volume 24, Issue 4, pp 323–326 | Cite as

The yield stress myth?

  • H. A. Barnes
  • K. Walters
Original Contributions


New experimental data obtained from constant stress rheometers are used to show that the yield stress concept is an idealization, and that, given accurate measurements, no yield stress exists. The simple Cross model is shown to be a useful empiricism for many non-Newtonian fluids, including those which have hitherto been thought to possess a yield stress.

Key words

Yield stress viscosity Cross model 


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  1. 1.
    Boger DV (1977) Nature 265:127Google Scholar
  2. 2.
    British Standard 5168 (1975) Glossary of Rheological TermsGoogle Scholar
  3. 3.
    Cross MM (1965) J Coll Sci 20:417Google Scholar
  4. 4.
    Lenge W, Rehage G (1980) In: Astarita G, Marrucci G, Nicolais L (eds) Rheology. vol 2, Plenum Press, p 354Google Scholar
  5. 5.
    Scott Blair GW (1933) J Applied Phys 4:113Google Scholar
  6. 6.
    Zeidler H, Altman S (1980) In: Astarita G, Marrucci G, Nicolais L (eds) Rheology, vol 3, Plenum Press, p 512Google Scholar

Copyright information

© Steinkopff 1985

Authors and Affiliations

  • H. A. Barnes
    • 1
  • K. Walters
    • 2
  1. 1.Unilever Research LaboratoryPort SunlightU.K.
  2. 2.Department of Applied MathematicsThe University College of WalesPenglais, AberystwythU.K.

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