Calculating current density of a PEM electrolytic cell in Ansys Fluent

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Hi, silly question. I'm simulating a PEM electrolyser in Ansys Fluent and I compute the total volume integral of the transfer current as show below. I wish to calculate my current density which would simply be dividing by the surface area. I am unsure of which value to use: the transfer current at the anode/cathode catalyst which are equal (balanced) or the net value which seems to be an absolute sum. Which of these values should I use to calculate current density? See bit highlighted in red.