抄録
We have investigated particle migration phenomena in a torsional flow of bi-dispersed suspensions or a suspension with aggregations. In the case of bi-dispersed systems, a small amount of larger/smaller black particulate suspension was injected into a base white one, and the diffusion or migration of the black particles in the flow was observed. When the two plates were parallel, only the diffusion of the black one was observed. But, when the two plates were a little inclined, larger/smaller particles migrated to the lower/higher shear rate region in many cases. Moreover, we have observed the migration of aggregated particles toward the center.
