Flow And Motion Behavior Of Particle
Suspensions In Shear Flow Over A Rough Surface
Author(s)
V. Mikulich & C. Brücker
Abstract
The paper discloses the experimental study results of the behavior of a thin layer
of low concentrated slurry in a shear flow over a rough surface with a defined
structure of the bottom wall. A new ring shear device was built which contains
an optically transparent test chamber of which the bottom wall contains arrays of
micro-cantilever force sensors simulating a defined surface roughness. It was
created by deep-etching of micro-pillars in a silicon wafer. The results of visual
observation of the interaction of the suspension with the structured surface
during severe deformation are shown. Observation covered the liquid phase
motion by micro-PIV, the interaction between the liquid phase and solid
particles, the movement of separate particles and their mutual interaction. The
contact interactions between particles and micro-pillars are exemplified.
The abrupt changes in rotational motion and translational velocity of particles
induce mutual collisions and continuous formation and break-up of cluster
structures of various types.
Keywords: slurry, shear flow, micro-structured surface, particle interaction,
micro-pillars, cantilever-array, force-measurements.
Keywords
Keywords: slurry, shear flow, micro-structured surface, particle interaction,
micro-pillars, cantilever-array, force-measurements.
Related Book
Other papers in this volume
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