Abstract

This paper describes an experimental study of the effects of injecting dilute aqueous polymer solutions into a turbulent boundary layer formed on a flat plate immersed in flowing water.

Hot-film anemometer techniques were employed in the measurement of the velocity profiles, turbulence intensities, and lateral correlation coefficients at a number of locations along the plate. Boundary layer growth parameters and the variation of the local skin friction coefficient were computed from the velocity profile data. The effects of polymer concentration and injection velocity on the local drag reduction are also presented.

It was found that momentum diffusivity was smaller than for pure water, and that the presence of the polymer molecules appeared to promote a more uniform distribution of the size of the turbulent eddies. Also, that the injection rate of a polymer solution can have a pronounced affect on the drag reduction.

Meeting Name

Symposium on Turbulence Measurements in Liquids (1969: Sep., Rolla, MO)

Department(s)

Chemical and Biochemical Engineering

Document Type

Article - Conference proceedings

Presentation Type

Contributed Paper

Session

Turbulence Measurements in Modified Fluids

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1972 University of Missouri--Rolla, All rights reserved.

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