Electrode Surface Coupling
This feature is only available in a limited set of add-on products. See
http://www.comsol.com/products/specifications/
for more details on availability.
Use this node to define a flux boundary condition based on current densities of one or multiple
Electrode Reaction
nodes in an Electrochemistry interface.
The flux is proportional to the current densities and the stoichiometric coefficients according to Faraday’s law as defined by summation over the
Reaction Coefficients
subnodes.
In the Transport of Concentrated Species interface, the molar fluxes are multiplied by the species molar masses to obtain the corresponding mass fluxes.
Note that if you are also modeling the momentum transport and expect a non-negligible total mass flux over the boundary, which is often the case for gas diffusion electrodes, you need to also add a corresponding Electrode Surface Coupling node in the Fluid Flow interface.