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Natural convection mass transfer at vertical electrodes

โœ Scribed by M.G. Fouad; T. Gouda


Publisher
Elsevier Science
Year
1964
Tongue
English
Weight
424 KB
Volume
9
Category
Article
ISSN
0013-4686

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โœฆ Synopsis


The ferricyanideferrocyanide redox system was studied undernaturalconvection conditions at vertical nickel electrodes by observations of the limiting current density of the cathodic process for electrodes of different heights. In the range 9 x 100 < ScGr < 4.57 x 101' the results lead to Nu = 0.45(ScGr)"*"5, where SC is the Schmidt number, Gr the Grasshof number and Nu the Nusselt number. In the range 457 x 10" < ScGr < 10" the results lead to Nu = 0.15(ScGr)".80.

R&um&Le systime r&lox ferri-ferrocyanure est 6tudit scion les conditions de convexion naturelle sur &&odes de Ni verticales, au moyen de la densite de courant limite du processus cathodique g diff&entes hauteurs. SC designant le nombre de Schmidt, Gr celui de Grasshof, Nu celui de Nusselt on a obtenu: Nu = 0,45 (ScGr)"@ pour 9 . log < ScGr < 4,57 . 10" et Nu = 0,15 (ScGr)O+a pour 4,57 . 1O1' < ScGr < 1014. Zusammenfassung-Es wurden die Grenzstriime der Reduktion von Ferricyanid zu an senkrechten Nickelkathoden verschiedener Hiihe unter Bedingungen der nattilichen Konvelction gemessen. Im Bereich 9 x loo < ScGr < 4,57 x 10" kannen die Ergebnisse durch die Korrelation Nu = 0,45(ScGr)"@ ausgedriickt werden, wobei SC die Schmidtsche Zahl, Gr die Grashof'sche Zahl und Nu die Nusseltsche Zahl bedeuten. Im Bereich 4,57 x 10" < ScGr < 10'4 kannen die Ergebnisse durch die Eteziehung Nu = 0,15(ScG~)~~*~ dargestellt werden.


๐Ÿ“œ SIMILAR VOLUMES


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