Rheology pp 167-171 | Cite as

Measurement of the First Normal Stress Coefficient of Polymer Melts in a Circumferential Flow Through an Annulus by Means of a Pressure Difference Transducer

  • Kalman Geiger


In a special class of flow, the steady shear flow, the following equations describe the components of the extra-stress tensor Open image in new window : The viscosity ∿, the first normal stress coefficient ψ1, and the second normal stress coefficient ψ2 are three material constants. The values of these constants depend on the shear rate and the temperature.


Shear Rate High Shear Rate Radius Ratio Steady Shear Steady Shear Flow 


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  1. /1/.
    Geiger, K. and Winter, H.H., Messung der ersten Normalspannungskoeffizienten von Kunststoffschmelzen im Bogenspalt, Rheol.Acta 17, 264–273 (1978).CrossRefGoogle Scholar
  2. /2/.
    Laiin, H.M., Description of the non-linear shear behaviour of a low density polyethylene melt by means of an experimentally determined strain dependent memory function, Rheol.Acta 17, 1–15 (1978).CrossRefGoogle Scholar
  3. /3/.
    Carreau, P.J., Ph.D. Thesis (University of Wisconsin, Madison 1968).Google Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • Kalman Geiger
    • 1
  1. 1.Institut für KunststofftechnologieUniversität StuttgartStuttgart 1Deutschland

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