Abstract
The effect of vibration on the viscosity of a suspension was investigated with a newly designed pressure-scanning capillary viscometer. The viscometer was designed to measure non-Newtonian viscosity continuously over a range of shear rates at a time. Low frequency vibration was applied perpendicularly to the direction of the suspension flow. The effect of the transversal vibration was investigated for a Newtonian fluid as well as a suspension. The experimental results showed that the vibration had no effect on the viscosity of the Newtonian fluid. However, the vibration caused a significant reduction of the suspension viscosity and yield stress. The viscosity reduction was strongly dependent on both vibration frequency and amplitude. In addition, the yield stress reduction was affected by the amplitude and frequency of vibration.
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