This model represents the proton exchange membrane of a PEMFC. The x axis extends from the anode to the cathode. By default, the cross-sectional area in the yz plane is 50 cm2.
The transport of protons includes inertance or inductance (i.e., translational momentum is stored) in the x direction in the subregions with index (x = 1, y > 1, z > 1). This is for numerical reasons, although in reality there is inductance.
Assumptions:
For more information, please see the Region model.