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The manifold rheology of fluidized granular media | | Olfa D'Angelo
; Abhishek Shetty
; Matthias Sperl
; W. Till Kranz
; | | Date: |
1 Sep 2023 | | Abstract: | Fluidized granular media have a rich rheology: measuring shear stress
$sigma$ as a function of shear rate $dotgamma$, they exhibit Newtonian
behavior $sigmasimdotgamma$ for low densities and shear rates, develop a
yield stress for intermediate shear rates and densities approaching the
granular glass transition, and finally, cross over to shear-thickening Bagnold
scaling, $sigmasimdotgamma^2$. This wealth of flow-behaviors makes
fluidized beds a fascinating material, but also one that is challenging to
encompass into a global theory, despite its relevance for optimizing industrial
processes and predicting natural hazards. We provide careful measurements
spanning eight orders of magnitude in shear rate, and show that all these
rheological regimes can be described qualitatively and quantitatively using the
granular integration through transient formalism, a theory for glassy dynamics
under shear adapted to granular fluids. | | Source: | arXiv, 2309.00413 | | Services: | Forum | Review | PDF | Favorites | |
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