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Document type:
Zeitschriftenaufsatz 
Author(s):
Ehrl, A.; Bauer, G.; Gravemeier, V.; Wall, W. A. 
Title:
A computational approach for the simulation of natural convection in electrochemical cells 
Abstract:
A novel computational approach for the numerical simulation of electrochemical systems influenced by natural convection phenomena is presented. A stabilized finite element framework for multi-ion transport mechanisms including convection, diffusion and migration coupled to an incompressible flow solver is developed. The role of a galvanostatic Butler-Volmer condition including the interaction of ionic concentration at the surface of the electrode and the surface overpotential is emphasized, to obtain a non-uniform surface overpotential distribution. Additionally, a threedimensional rotationally-symmetric boundary condition is used for modeling rotating cylinder electrodes. The computational framework is tested for various numerical examples exhibiting two- and three-dimensional electrochemical cell configurations including dilute CuSO4 electrolytes with and without excess of supporting H2SO4 electrolyte. 
Keywords:
natural convection; computational electrochemistry; galvanostatic constraint condition; Butler-Volmer-condition; finite element method 
Dewey Decimal Classification:
620 Ingenieurwissenschaften 
Journal title:
Journal of Computational Physics (JCOMP) 
Year:
2013 
Journal issue:
235 
Pages contribution:
764-785 
Covered by:
Web of Science 
Reviewed:
ja 
Language:
en 
Status:
Verlagsversion / published 
Semester:
WS 12-13 
Format:
Text