S0501-1-4 CTAB/NaSal水溶液の矩形管内流れ(複雑流体の流動現象(1))

概要

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The flows of CTAB/NaSal solutions in two rectangular channels were investigated. Measurments of flow property, velocity profile and flow birefringence and flow visualization experiments were carried out. The solutions show both shear-thinning and shear-thickening in viscosity. In the shear-thinning region, flow birefringence starts to increase. In the shear-thickening region, the magnitude of flow bireflingence is larger than that in shear-thinning region and a striped white turbidity emerges at near-wall region where the velocity gradient is large. Moreover, white turbidity periodically repeats appearance and disappearance in a small channel, while it continues to appear in a large channel. These results indicate that a large flow space is one of the requirements of stable emergency of white turbidity.
2009-09-12