The effect of dilute polymer solution on the Strouhal frequency of circular cylinders.
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Authors
Kell, Richard Edward
Subjects
Polymer flow
Bluff body
Strouhal number
Vortex shedding
Circular cylinders in polymer flow
Strouhal frequency in polymer flow
Drag reduction
Circular cylinder vortex shedding
Frequency spectrum of circular cylinder wake
Bluff body
Strouhal number
Vortex shedding
Circular cylinders in polymer flow
Strouhal frequency in polymer flow
Drag reduction
Circular cylinder vortex shedding
Frequency spectrum of circular cylinder wake
Advisors
Sarpkaya, T.
Date of Issue
1971
Date
June 1971
Publisher
Monterey, California ; Naval Postgraduate School
Language
en_US
Abstract
Flow of aqueous solutions of Polyox WSR-301, at a concentration of 25 wppm, was investigated in the cylinder drag transition region of Reynolds numbers. Frequency spectrum and drag force were measured on a circular cylinder (diameter 1 inch). Frequency spectrum, Strouhal frequency and drag force also were measured on circular cylinders in water (diameter 1 and 1-1/2 inch).
The polymer additive did not alter the vortex shedding frequency from that of water at the same Reynolds numbers. As the polymer degrades, a state is reached where concentration, Reynolds number and body
size combination become such that the transition occurs in the boundary layer.
Transition in the polymer solution occurred earlier than that in the pure solvent. At one Reynolds number, several regimes of flow may be observed as the polymer solution degrades.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
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.