Shear Flow of Suspensions under Wall Influence: Phenomenological Theory and Effects

The influence of solid boundary walls in shear flow of suspensions leads to structure formation and particle transport. We have developed a phenomenological model to describe the wall effects such as the formation of a wall boundary layer, the occurence of pseudo wall slip as well as discontinuities of the particle concentration. Using the model particle concentration profiles, thickness of boundary layer and suitably defined wall slip velocities depending on the total particle concentration of the suspension can be determined.