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Unsteady, laminar flows of non-Newtonian fluids in pipes

โœ Scribed by M.F. Edwards; D.A. Nellist; W.L. Wilkinson

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
902 KB
Volume
27
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

Velocity profiles for unsteady laminar flows of power law non-Newtonian fluids in pipes have been derived using an explicit finite difference technique. Three unsteady flows have been considered, viz.

(1) The transient start-up following the sudden imposition of a constant pressure gradient to a fluid at rest.

(ii) Oscillatory flow following the imposition of a sinusoiially varying pressure gradient with a zero mean value.

(iii) Pulsating flow following the imposition of a sinusoidally varying pressure gradient with a nonzero mean.

The effects of the major parameters which influence these flows are demonstrated.

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