Publication:
Drag of spheres in dilute aqueous solutions of poly(ethylene oxide) within the region of the critical Reynolds number

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Authors
Chenard, John Henry
Subjects
Drag reduction
Poly(ethylene oxide)
Blunt bodies
Critical Reynolds number
Advisors
Sanders, James N.
Date of Issue
1967-12
Date
December 1967
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
The drag reducing effect of poly (ethylene oxide) additives on blunt bodies in water was investigated by examining the behvaior of a sphere in both subcritical and supercritical Reynolds number regions. Drop tests were conducted in water and in concentrations of poly(ethylene oxide) WSR 301 ranging in concentration from 50 wppm to 1000 wppm. Reduction in drag was noted for all concentrations in the Reynolds number range of 4 x 104 to s.5 x 105. A critical Reynolds number of 4.5 x 105 was observed for dilute solutions (50 and 100 wppm), while more concentrated solutions exhibited a uniformly decreasing drag. These results are explained by examining the interaction of profile and friction drag, together with the effects of polymer additives upon wake diameter size.
Type
Thesis
Description
Series/Report No
Department
Department of Physics
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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