Constitutive model for time-dependent flows of shear-thickening suspensions
arXiv:1911.00280 · doi:10.1103/PhysRevLett.123.214504
Abstract
We develop a tensorial constitutive model for dense, shear-thickening particle suspensions subjected to time-dependent flow. Our model combines a recently proposed evolution equation for the suspension microstructure in rate-independent materials with ideas developed previously to explain the steady flow of shear-thickening ones, whereby friction proliferates among compressive contacts at large particle stresses. We apply our model to shear reversal, and find good qualitative agreement with particle-level, discrete-element simulations whose results we also present.
arXiv comment6 pages, 4 figures
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- Rheology of dense suspensions under shear rotation
- Shear jamming and fragility of suspensions in a continuum model with elastic constraints
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