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Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
Published on: April 10, 2017
Rheology of a confined granular material
1Laboratoire des Milieux Désordonnés et Hétérogènes UMR7603, Université Pierre et Marie Curie, Boîte 86, 4, Place Jussieu, 75005 Paris, France.
Abstract:
We study the rheology of a granular material slowly driven in a confined geometry. The motion is characterized by a steady sliding with a resistance force increasing with the driving velocity and the surrounding relative humidity. For lower driving velocities a transition to stick-slip motion occurs, exhibiting a blocking enhancement with decreasing velocity. We propose a model to explain this behavior pointing out the leading role of friction properties between the grains and the container's boundary.
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