Surface wake of a circular cylinder in dilute aqueous solutions of poly (ethylene oxide).
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Authors
Fletcher, Michael Henry
Subjects
semi-submerged circular cylinder
poly(ethylene oxide) solutions
spray height and ventilation pocket depth
poly(ethylene oxide) solutions
spray height and ventilation pocket depth
Advisors
Sanders, James V.
Date of Issue
1969-06
Date
June 1969
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
The wake formed by surface-piercing circular cylinders towed through 0, 100, and 200 parts per million (by weight) aqueous solutions of Poly(ethylene oxide), Polyox WSR-301, was examined photographically. Cylinder diameters ranged from 1/4 in. to 2 in.; Froude numbers from 0.6 to 10. Measurements of spray height and ventilation pocket depth were made. No significant alteration of pocket depth with polymer concentration was observed; however, the spray height was reduced by increasing the Polyox concentration. Qualitative differences between the wakes of cylinders in Polyox solutions and those in water were (1) a serrated separation line characterized the ventilation pocket of the polymer solutions as opposed to straight separation line of water, (2) the striated appearance of the pocket walls in Polyox instead of the clear, smooth walls in water, (3) the coherence displayed by the spray in Polyox instead of the random character of the spray in water, and (4) the larger and more irregularly shaped bubbles in Polyox as opposed to those in water.
Type
Thesis
Description
Series/Report No
Department
Physics (PH)
Organization
Naval Postgraduate School (U.S.)
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.