(326c) A Multiscale Tensorial Approach for Modeling the Rheology of Thixotropic Aggregating Suspensions
AIChE Annual Meeting
Tuesday, November 9, 2021 - 1:15pm to 1:30pm
In this work, we show that previously established rheological model based on population balances, along with a polydisperse description of suspension viscosity, can be recast such that the kernels and constitutive models become consistent with the scaling in the NET framework. Specifically, we address the breakage kernel, which has been shown to scale as a function of stress for both shear and extensional flows  such that resulting tensorial model can be used to describe full three-dimensional macroscopic flows. The model predictions for both simple shear and uniaxial extensional flow are compared against the existing models. As the non-equilibrium thermodynamics offers a more consistent tensor description, we also explore how the model can capture inhomogeneities and effects such as stress-induced migration.
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