Figure 2.

Schematic of the annular TSV geometry used in the S-NDR model including the domains of the volume terms and the locations of the surface terms; the subscript i indicates equations for $i=N{i}^{2+},i=S{O}_4^{2-}$ and i = PEI. The domains of the relevant equations, volume and boundary, are noted. The upper surface of the modeled volume corresponds to the top of the boundary layer as well as the planar counter electrode and reference.