Geometry I
Build the model geometry as a single interval, where the left boundary will later be defined as the electrode surface, and the right boundary will be the boundary toward the bulk.
Interval 1
1
In the Geometry toolbar, click Interval .
In the Settings window for Interval type L in the second row in Coordinates (m) table. This sets the interval length to L. The value of L is defined in the Parameters node. Note that L will vary with the Voltammetric scan rate parameter v, which is also defined in the Parameters node. This is done to ensure the length of the electrolyte domain is always greater than diffusion length.
2
In the Geometry toolbar, click Build all  . The completed geometry is now built and appears in the Graphics window: