Abstract
Velocity profiles in concentrated particle suspension flows through a channel were measured using magnetic resonance imaging (MRI). We used non-Newtonian fluids containing suspended particles at high volume fractions. The particles have spherical, slender, and disk-like shapes, respectively. These suspension fluids are opaque. The channel used has a square cross section and an abrupt contraction geometry. As a result, we found that the velocity profile depends on the particle shape in the contraction. Spheres did not affect the flow field but slender and disk-like particles caused a concave shape in the velocity profile.
