Abstract
Numerical solutions are presented for fully developed laminar flow for a modified power law fluid (MPL) in conduits of arbitrary cross sections. The solutions are applicable to pseudoplastic fluids over a wide shear rate range from Newtonian behavior at low shear rates, through a transition region, to power law behavior at higher shear rates. The analysis identified a dimensionless shear rate parameter which, for a given set of operating conditions, specifies where in the shear rate range a particular system is operating, i.e. in the Newtonian, transition, or power law regions. The numerical results of the friction factor times Reynolds number for the Newtonian and power law region are compared with previously published results showing agreement within 0.05% in the Newtonian region, and 0.9% and 5.1% in the power law region.
Original language | English |
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Pages (from-to) | 1057-1067 |
Number of pages | 11 |
Journal | Chemical Engineering Science |
Volume | 57 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2002 Mar 14 |
Keywords
- Friction factor in internal flow
- Modified power law
- Non-Newtonian fluid flow
- Non-circular duct flow
- Pressure drop in internal flow
- Pseudoplastic fluid flow
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Industrial and Manufacturing Engineering