caa a22 4500 47704980X CHVBK 20180405111338.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/BF00249925 doi (NATIONALLICENCE)springer-10.1007/BF00249925 Mass transport in a weakly stratified electrochemical cell [Elektronische Daten] [C. Wallgren, F. Bark, R. Eriksson, D. Simonsson, J. Perssont, R. Karlsson] A study of natural convection in an electrochemical system with a Rayleigh number of the order 1010 is presented. Theoretical and experimental results for the unsteady behaviour of the concentration and velocity fields during electrolysis of an aqueous solution of a metal salt are given. The cell geometry is a vertical slot and the reaction kinetics is governed by a Butler-Volmer law. To reduce the effects of stratification, the flush mounted electrodes are located (symmetrically) in the middle parts of the vertical walls. It is demonstrated, both theoretically and experimentally, that a weak stratification develops after a short time, regardless of cell geometry, even in the central part of the cell. This stratification has a strong effect on the velocity field, which rapidly attains boundary layer character. Measured profiles of concentration and vertical velocity at and above the cathode are in good agreement with numerical predictions. For a constant cell voltage, numerical computations show that between the initial transient and the time when stronger stratification reaches the electrode area, the distribution of electric current is approximately steady. Chapman & Hall, 1996 Wallgren C. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Bark F. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Eriksson R. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Simonsson D. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Perssont J. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Karlsson R. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/12(1996-12-01), 1235-1244 0021-891X 26:12<1235 1996 26 10800 https://doi.org/10.1007/BF00249925 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00249925 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wallgren C. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Bark F. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Eriksson R. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Simonsson D. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Perssont J. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 700 1- Karlsson R. Department of Mechanics, Royal Institute of Technology, S 100 44, Stockholm, Sweden aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/12(1996-12-01), 1235-1244 0021-891X 26:12<1235 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer