Abstract
Drag reduction in the pipe flow of polymer solutions is shown to be of two types which apparently occur by two separate mechanisms. In turbulent flow, drag reduction is probably caused by viscoelastic effects. The critical solvent Reynolds number at the onset of drag reduction is proportional to about the first power of the diameter. Thus, the critical velocity is independent of tube diameter. Polymers dissolved in good solvents show more drag reduction than in poor solvents. The other type of drag reduction occurs when the laminar region is extended to high Reynolds numbers. It is followed by a transition region and a turbulent region in which the drag is not affected. © 1967, American Chemical Society. All rights reserved.
Recommended Citation
H. C. Hershey and J. L. Zakin, "Existence Of Two Types Of Drag Reduction In Pipe Flow Of Dilute Polymer Solutions," Industrial and Engineering Chemistry Fundamentals, vol. 6, no. 3, pp. 381 - 387, American Chemical Society, Aug 1967.
The definitive version is available at https://doi.org/10.1021/i160023a010
Department(s)
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
0196-4313
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 American Chemical Society, All rights reserved.
Publication Date
01 Aug 1967
