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High shear rheology of shear banding fluids in microchannels
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View: Figures


Image of FIG. 1.
FIG. 1.

Sketch of the experimental setup.

Image of FIG. 2.
FIG. 2.

Velocity profiles for a CTAB in solution at a temperature of measured in the middle of the width of the channel at 1 cm from the inlet in the flow direction. Increasing maximum velocities correspond to increasing pressures drops: (a) 0.4/1/1.4 bars, (b) 1.8/2/2.2/2.4 bars, (c) 2.5/2.7/2.9/3.1 bars, and (d) 3.2/3.4/3.8 bars.

Image of FIG. 3.
FIG. 3.

Stress vs shear rate relation obtained from the velocity profiles of Fig. 2 with corresponding symbols and from velocity profiles at intermediary driving pressures (not represented on Fig. 2 for clarity). The insert represents the value of the stress at the interface between the shear bands extracted from the profiles of Figs. 2(b) and 2(c), the line representing the mean of these values.

Image of FIG. 4.
FIG. 4.

Slip length vs shear rate at the wall in the shear-banding regime, for driving pressures ranging from 1.8 to 3.2 bars.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High shear rheology of shear banding fluids in microchannels