Dear Researchers:

I am performing a modeling in Comsol Multiphysics. Using the Water Electrolyzer module.

I built a model of a PEM water electrolyzer. The geometry is attached here as the first image.

I set up the parameters of my cell. I want to run a simulation in a stationary state (not dynamical).

So i set it up with a cell potential of 1.8 Volts, and a given temperature and pressure.

Also selected the materials for the membrane and for all the layers.

I want to ask, if someone can help me to confirm/validate my results... Not the magnitud of the numbers, but the sens and direction of the numbers and the gradients distribution ...

For the electric potential across the cell I got a constant distribution of potential (attached image)

For the electrolytic potential, I got the shown distribution :/ ?

Can someone tell me or comment with me. If this might be wrong or might be right ...

For the first image. It makes sens there is 0V electric potential on the membrane... But I don't understand why the electric potential keeps constant when changing the open cell voltage of the cell.

Also why the electrolytic potential takes that distribution: a graditn profile from the bottom changing up to the upper boundary.

Is it correct to stablish and Electric potential boundary condition on most exterior wall (at the right) of the whole geometry, and and electric ground (V=0) at the most exteiror wall (at the left) ?

Thanks for your help !