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- Title:
A computational approach for the simulation of natural convection in electrochemical cells
- Document type:
- Zeitschriftenaufsatz
- Author(s):
- 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.
- 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
- Fulltext / DOI:
- doi:10.1016/j.jcp.2012.08.043
- Status:
- Verlagsversion / published
- Semester:
- WS 12-13
- Format:
- Text
BibTeX