2013/07/31 by Claus Heussinger · 1 citation
Physics and Astronomy · #cond-mat.soft #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physreve.88.050201
published as Phys. Rev. E 88, 050201 (2013)
arxiv created 2013/11/21 · arxiv updated 2013/11/27
We consider the shear rheology of concentrated suspensions of non-Brownian frictional particles. The key result of our study is the emergence of a pronounced shear-thickening regime, where frictionless particles would normally undergo shear-thinning. We clarify that shear thickening in our simulations is due to enhanced energy dissipation via frictional inter-particle forces. Moreover, we evidence the formation of dynamically correlated particle-clusters of size ξ, which contribute to shear thickening via an increase in viscous dissipation. A scaling argument gives η∼ ξ2, which is in very good agreement with the data.