Abstract
In a special class of flow, the steady shear flow, the following equations describe the components of the extra-stress tensor
:
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.
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References
Geiger, K. and Winter, H.H., Messung der ersten Normalspannungskoeffizienten von Kunststoffschmelzen im Bogenspalt, Rheol.Acta 17, 264–273 (1978).
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).
Carreau, P.J., Ph.D. Thesis (University of Wisconsin, Madison 1968).
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Geiger, K. (1980). Measurement of the First Normal Stress Coefficient of Polymer Melts in a Circumferential Flow Through an Annulus by Means of a Pressure Difference Transducer. In: Astarita, G., Marrucci, G., Nicolais, L. (eds) Rheology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3743-0_34
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DOI: https://doi.org/10.1007/978-1-4684-3743-0_34
Publisher Name: Springer, Boston, MA
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