Ionic mass transfer in presence of turbulence promoters in a circular conduit

Ionic mass transfer in a circular conduit in the presence of ring promoter assembly is measured by limiting current technique using diffusion controlled electrochemical reactions (reduction of ferricyanide and oxidation of ferrocyanide). A supporting rod on which rings are mounted at equidistance is concentrically fixed in the conduit of 0.05 m I.D. to augment the mass transfer rates. Cross-sectional diameter of the ring is changed from 0.0065 m to 0.0125 m and the spacing in between the rings is varied from0.03 m and 0.15 m respectively. The improvement in mass transfer coefficients is up to 6.5. The data are correlated by the following dimensionless equation.