Abstract

Mass transfer to the surface of rotating electrodes during turbulent flow was studied by electrochemical methods under steady and non-steady state diffusion conditions.

The flow was due to a large rotating disk made from insulating material, flush with the surface of which was mounted a ring shaped electrode of platinum or nickel.

A local study of the radial component of the convective diffusion in turbulent flow was carried out with very thin ring electrodes (width ΔR ~ 0,05 mm). The diffusion layer thickness was varied relatively to the diffusion sublayer thickness by changing the ring width or the rotation speed so as to determine the eddy diffusivity in the viscous sublayer.

The local viscous friction was measured at the wall by a steady state method. As an application, the drag reduction phenomenon was studied in the presence of high polymer additives. Using a non-steady state method which yields the electrochemical impedance, we examined the possibility of adsorption of polymers at the wall- fluid interface.

Meeting Name

4th Biennial Symposium on Turbulence in Liquids (1975: Sep., Rolla, MO)

Department(s)

Chemical and Biochemical Engineering

Document Type

Article - Conference proceedings

Presentation Type

Contributed Paper

Session

Electrochemical Methods of Turbulence Measurement

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1975 University of Missouri--Rolla, All rights reserved.

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