Abstract
The dispersive plug flow mathematical model derived in the previous paper has been applied to experimental data obtained in model cells. Even though the results are approximate it is shown that the local mixing environment close to an electrode, and the segregation of the wall layer from the core flow, are dependent upon a number of operating variables, one of which is the direction of flow. The insight gained can be used to explain the distribution of products in a number of electrosynthetic reactions.
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Abbreviations
- ¯D :
-
dispersion coefficient (cm2 s−1)
- h :
-
interelectrode gap (cm)
- M 1 :
-
first moment of the response, defined by Equation 3
- M 2 :
-
second moment of the response, defined by Equation 4
- Q =V/h :
-
volumetric flow rate per unit interelectrode gap (cm2 s−1)
- r :
-
radius (cm)
- (Re)=V/hv=Q/v :
-
channel Reynolds number
- (Re)φL=ωr 2/v:
-
local rotational Reynolds number
- ¯t :
-
plug flow residence time, defined by Equations 6 or 7 (s)
- V :
-
volumetric flow rate (cm3 s−1)
- τ :
-
mean residence time of marked fluid (s)
- v :
-
kinematic viscosity (cm2 s−1)
- ω :
-
angular velocity (rad s−1)
- i:
-
inner
- I:
-
inflow
- o:
-
outer
- O:
-
outflow
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Fleischmann, M., Ghoroghchian, J. & Jansson, R.E.W. Dispersion in electrochemical cells with radial flow between parallel electrodes. II. Experimental results for capillary gap cell and pump cell configurations. J Appl Electrochem 9, 437–444 (1979). https://doi.org/10.1007/BF00617554
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DOI: https://doi.org/10.1007/BF00617554