Abstract

Particle image velocimetry (PIV) was used to measure the velocity field of the Taylor-Couette flocculation flow with different flocs as the tracer. It can be seen that these different flocs can be used as trace particles in PIV for flow field measurement. The results indicated that the velocity vector maps obtained by PIV with different flocs can express the variation characteristics of the flocculation flow field structure of the vortex. At the same time, the velocity vector field obtained by PAC flocs generated in real time as trace particle is almost similar to that obtained by FeCl3. The major changes of the flow field in the coagulation process are mainly due to the change of rotation speed rather than the change of flocculants type or dosage.

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