The Current Distribution, Shell interface
The Current Distribution, Shell interface (cdsh) (), found under the Electrochemistry branch ()when adding a physics interface, describes the electrolyte charge transport in thin electrolyte layers in the tangential direction on a boundary. By replacing the domain electrolyte partial differential equation by a tangential formulation on the boundary, the problem size can be reduced, and potential problems with mesh anisotropy in the thin layer can be avoided.
The physics interface is typically used for atmospheric corrosion problems, but is suitable for any problem with thin electrolytes layers where the potential variation in the normal direction to the boundary is negligible.
The interface is similar to the The Primary and Secondary Current Distribution Interfaces, but solves for the electrolyte potential (phil) only, on the boundaries to the geometry. The interface is available in 2D, 2D with axial symmetry and 3D.
Compared to the The Primary and Secondary Current Distribution Interfaces, the following differences should be noted:
•
The thickness of the thin electrolyte layer is specified on the Electrolyte node.
•
The Electrode Surface node has the same dimension as the Electrolyte node. That is, the thin Electrolyte is assumed to be located on top of the Electrode Surface.
Atmospheric Corrosion of a Busbar: Application Library path Corrosion_Module/Cathodic_Protection/atmospheric_corrosion_busbar.