Predictions of pressure drop for modified power law fluids in conduits of three different cross-sectional shapes

Simsoo Park, Dong Ryul Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)1057-1067
Number of pages11
JournalChemical Engineering Science
Volume57
Issue number6
DOIs
Publication statusPublished - 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

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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