FOR : Validation of Turbulence & Non-Newtonian Models
PURPOSE OF THE CALCULATIONS:
The main objective of the calculations is to validate the low-Re
turbulence model and non-Newtonian model for the flow of Power-
Law fluids in pipes.
Power-law fluids are time-independent viscous fluids for which
the shear stress is related to the deformation rate by the
consistency index K and the power-law index n. For n<1, the
fluid is pseudoplastic (shear thinning), and for n>1, it is
dilitant (shear thickening). If n=1, the fluid is Newtonian.
The flow of Power-law in pipes is relevant in the many
engineering applications, especially within the manufacturing
and process industries.
Calculations are made to calculate the frictional resistance,
along with the fully-developed velocity profile, for both
laminar and turbulent flow by use of the single-slab solver.
The turbulence is represented by use of a modified version of
the Lam-Bremhorst low-Re k-e model.
The parameters are: the Fanning friction factor f; the power-law
index n; and the Generalised Reynolds number: