Fig. 2. (a) Shear viscosity as a function of the shear rate for the Newtonian and viscoelastic fluids used. Rheological measurements using fluids PAA300 and N90 were performed at T = 24 °C whereas the rheological measurements of PAA190 fluid were performed at T = 22 °C. Symbols correspond to the experimental data, and solid lines correspond to the fittings using a Carreau model. The dashed line correspond to shear viscosity of the N90 fluid. (b) First normal stress difference as a function of the shear rate for the viscoelastic fluids used. The measurements of N1 were carried out under the same conditions as the measurements of the shear viscosity.
