Benutzer: Gast  Login
Titel:

A computational approach for the simulation of natural convection in electrochemical cells

Dokumenttyp:
Zeitschriftenaufsatz
Autor(en):
Ehrl, A.; Bauer, G.; Gravemeier, V.; Wall, W. A.
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.
Stichworte:
natural convection; computational electrochemistry; galvanostatic constraint condition; Butler-Volmer-condition; finite element method
Dewey Dezimalklassifikation:
620 Ingenieurwissenschaften
Zeitschriftentitel:
Journal of Computational Physics (JCOMP)
Jahr:
2013
Heft / Issue:
235
Seitenangaben Beitrag:
764-785
Nachgewiesen in:
Web of Science
Reviewed:
ja
Sprache:
en
Volltext / DOI:
doi:10.1016/j.jcp.2012.08.043
Status:
Verlagsversion / published
Semester:
WS 12-13
Format:
Text
 BibTeX