Apparatus for studies in turbulent flow regimes

That the flow is turbulent can be tested by consideration of the mass transport limited current-flow rate behaviour in this regime, which is predicted theoretically to be [99, 114-116] 

Hence a plot of 4m versus Re7/12 should be linear and the slope should accurately predict the diffusion coefficient of the test species . For the experimental system described above, Vielstich and co-workers obtained good agreement with eqn. (106), provided that l 100 /jm. A lower rate of mass transport than predicted to shorter electrodes was attributed to surface roughness at the electrode and the wall of the tube. 

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