The Edge Electrode can be used in 3D problems to define electrodes such as long pipes and thin wires where the electric potential variation within the electrode in the normal direction to the electrode surface is negligible. This assumption allows for the thin electrode domain to be replaced by a lumped one-dimensional partial differential equation formulation on the edge, describing an electrode surface along the edge with a given
Edge electrode radius. In this way the problem size can be reduced, and potential problems with mesh anisotropy in the thin layer can be avoided.
The electric current conduction in the tangential direction of an edge can be described by Ohm’s law or a
Fixed electric potential or a
Floating potential assuming infinite conductivity of the edge or an
External short electric potential which allows to connect two electrodes over an external connector with a given bulk resistance.
A default Electrode Reaction subnode is added by default to the feature.
Double Layer Capacitance,
Electric Ground,
Electric Potential, and
Electrode Current subnodes can also be added to the feature.
See the Electrode Surface node. The section is only available when a
Secondary current distribution has been selected on the parent node.
) and select Advanced Physics Options in the Show More Options dialog box.