Discussion Forum

Hello,

I am making a model of an electrode in solution with the Secondary Current Distribution Interface. The model shows a time-dependent redistribution of the current density at the electrode caused by the electric double layer capacitance on the electrode. In order to make the model more of a closed loop I modeled the calculation of the double layer capacitance with the PDE interface using a modified Poisson-Boltzmann equation. Now the computer will calculate the double layer capacitance based on general material properties of the solution and electrode instead of making me go and do electro-chemistry to extract this value.

So I have one geometry created for the time-dependent secondary current distribution module and another geometry for the stationary PDE solver and they are in separate studies. How do I take the value I calculate from the PDE solver and input it into the boundary conditions of the other study when double layer capacitance isn't a natural dependent variable that comsol can normally carry between studies just fine. I need to input my calculate into something which is in fact within the electrolyte-electrode boundary condition and not an initial voltage/potential or other dependent variable.

Best,
Trevor Davis