Cf. Oduoza et al., MIXED CONVECTION MASS-TRANSFER STUDIES OF OPPOSING AND AIDING FLOW INA PARALLEL-PLATE ELECTROCHEMICAL FLOW CELL, Journal of Applied Electrochemistry, 28(7), 1998, pp. 697-702
Studies of combined natural and forced convection in a vertical parall
el plate electrochemical cell in laminar conditions in cases of opposi
ng and aiding flow are reported. In an ongoing project it was necessar
y to identify conditions in which natural convection had no significan
t influence on mass transfer rates at the cell walls so that data coul
d be validly compared with purely laminar flow computational models. F
or the different electrode lengths investigated, natural convection do
minated at low Reynolds number and there was no Reynolds number depend
ence. At high Reynolds number the data approached the laminar flow sol
ution. At intermediate Reynolds number, however, there existed a disti
nct region where free and forced convection were significant. At high
electrolyte concentrations data did not merge with laminar flow equati
ons until Re = 1000 and low electrolyte concentration data for the lar
ge plate could not be compared with numerical predictions below Re of
250. An attempt was made to compare the data with those of other worke
rs on combined forced and natural convection heat and mass transfer.