Electronic Resource
New York
:
Wiley-Blackwell
Journal of Polymer Science: Polymer Physics Edition
11 (1973), S. 2339-2356
ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A new theory, which relates viscous drag reduction to the energy stored by polymer molecules subjected to a fluctuating wall shear rate, is proposed for the origin of the Toms effect. The strain energy densities of several polymer solutions were estimated from bead-spring theory. The requisite molecular polymers were optimized by a least-squares fit of calculated to observed intrinsic viscosities. Friction reduction was found to be a monotonic function of the strain energy density for a given polymer-solvent combination. The correlation was independent of molecular weight and concentration for pipes of 0.5-2.0 in. diameter. Differences between the points of onset of drag reduction for different polymer-solvent combinations may be due to the unequal effect of internal viscosity.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1973.180111204
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