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Drag reduction and structural turbulence in flowing polyox solutions

✍ Scribed by R. C. Little; M. Wiegard

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
483 KB
Volume
14
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Structural turbulence has been detected in dilute aqueous solutions of Polyox Coagulant (also known to be a highly effective drag‐reducing agent). The flow line which characterizes structural turbulence from its onset in the laminar region passes well into the fully turbulent region (Reynolds turbulence) with virtually no change in slope, implying that the same molecular oscillations or segmental motions responsible for structural turbulence are now operative in drag reduction. The persistence of structural turbulence at very low concentrations is rationalized on the basis of Busse's explanation of the role of polymer entanglements in viscosity and elastic turbulence.

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