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Turbulent flow and mass transfer on a rotating hemispherical electrode
Author(s) -
Chin DerTau
Publication year - 1974
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690200206
Subject(s) - turbulence , mass transfer , radius , schmidt number , electrode , mechanics , mass transfer coefficient , electrolyte , flow (mathematics) , thermodynamics , chemistry , heat transfer , diffusion , physics , materials science , classical mechanics , reynolds number , computer security , computer science
Abstract Using the Karman‐Pohlhausen integral method, an analysis has been made for turbulent flow on a rotating hemispherical electrode mounted on an inert support rod of equal radius. The resulting friction coefficient is then substituted into the Chilton‐Colburn relation to give a rate equation for mass transfer at high Schmidt numbers. Experiments with a diffusion‐controlled electrolytic system over a range of Sc from 910 to 6,300 confirm the validity of the theory for Re > 40,000. A comparison with the results of previous heat and mass transfer measurements reveals that the turbulent flow on the present geometry is different from that on a rotating sphere and on a hemispherical electrode mounted on a support rod of larger radius.