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Glossary · Slurry & non-Newtonian
Non-Newtonian Fluid
Fluid whose viscosity changes with shear rate and hence not constant. Depending on the fluid itself and resulting stress from an applied shear, its viscosity may increase or decrease.
Modeled in FluidFlow using the following rheological models:
- Power Law
\tau = K \gamma^n - Bingham Plastic
\tau = \tau_{BP} + \eta_P \gamma - Herschel – Bulkley
\tau = \tau_{HB} + K \gamma^n - Casson
\tau^{0.5} = \tau_{C}^{0.5} + \eta_C \gamma^{0.5}
Where:
\tau | Shear Stress |
| K | Consistency coefficient |
| n | Flow behavior exponent |
| $\gamma$ | Shear rate |
| $\tau_{BP}$ | Bingham plastic yield stress |
| $\tau_{HB}$ | Herschel – Bulkley yield stress |
| $\tau_{C}$ | Casson yield stress |
| $\eta_{P}$ | Plastic viscosity / coefficient of rigidity |
| $\eta_{C}$ | Casson viscosity |
Related definitions
Go deeper
Article
Non-Newtonian Fluids: Types & Examples
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Knowledge Base
Non-Newtonian Viscosity Models
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Knowledge Base
Bingham Plastic – Non-Newtonian Fluid
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Article
Slurry Rheology & Viscosity in Pipe Design
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Module
Slurry Flow and Non-Newtonian Fluid Modeling
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