Modelling the Microstructure and Stress in Dense Suspensions Under Inhomogeneous Flow
arXiv:2009.14548 · doi:10.1103/PhysRevLett.125.184503
Abstract
Under inhomogeneous flow, dense suspensions exhibit complex behaviour that violates the conventional homogenous rheology. Specifically, one finds flowing regions with a macroscopic friction coefficient below the yielding criterion, and volume fraction above the jamming criterion. We demonstrate the underlying physics by incorporating shear rate fluctuations into a recently proposed tensor model for the microstructure and stress, and applying the model to an inhomogeneous flow problem. The model predictions agree qualitatively with particle-based simulations.
arXiv comment7 pages, 4 figures
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