Suspensions are complex fluids. The flow behavior, i.e. the rheology, of suspensions is determined by a multitude of parameters. Most of these, such as shape, size, size distribution and density, are properties of the dispersed particles themselves.
The particle technology group utilizes a wide variety of measurement technologies to research the complex interactions that define a suspension’s rheology. Currently, our work focuses on the measurement of velocity profiles in various geometries by direct observation via particle image velocimetry. This allows us to study the suspension’s behavior near the yield stress in detail and infer the causes of apparent wall slip.