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Numerical simulation of mass transfer and convection near a hydrogen bubble during water electrolysis in a magnetic field

G. Mutschke1, 2 - D. Baczyzmalski3 - C. Cierpka4 - F. Karnbach2, 5 - M. Uhlemann5 - X. Yang1, 2 - K. Eckert1, 2 - J. Fröhlich2

1 Helmholtz-Zentrum Dresden--Rossendorf, PO Box 510119, D-01314 Dresden, Germany
2 Technische Universität Dresden, D-01062 Dresden, Germany
3 Universität der Bundeswehr München, D-85577 Neubiberg, Germany
4 Technische Universität Ilmenau, D-99693 Ilmenau, Germany
5 IFW Dresden, D-01069 Dresden, Germany

Abstract
Numerical simulations are presented resolving in detail local phenomena near a single hydrogen bubble at the cathode during the electrolysis of water. The modelling is based on recent experiments on hydrogen evolution at a platinum micro-electrode. The simulation results provide local insight into electrolyte convection, species concentration and mass transfer during electrolysis, and the influence of the Lorentz force caused by a vertical magnetic field on the bubble departure is discussed. Figs 5, Refs 15.

Magnetohydrodynamics 53, No. 1, 193-200, 2017 [PDF, 0.85 Mb]

Copyright: Institute of Physics, University of Latvia
ISSN (electronic edition): 1574-0579; ISSN (printed edition): 0024-998X