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Drastical change in current density

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Old   August 3, 2024, 11:19
Default Drastical change in current density
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Leyton
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Hello. I am doing my final degree project and it is based in modifying the geometries of bipolar plates and see how it affects the fuel cell performance.

Firstly, I have already made the geometry modifications and have also done the meshing and import to fluent module. The setup of the PEMFC has been correctly done but, now, once I have changed the inlet flows, current density on cathode looks like this:
Attachment 100955
The red arrows shape is the cathode's shape and I dont know how can it be possible if I have only changed the inlet flows.
Without the changes in inlet flows it looks like this:
Attachment 100957
Attachment 100958
The data for the inlet flows has been taken from the ansys tutorial for PEMFC (anode inlet: 1e-7 [Kg/s]; cathode inlet: 1.4e-6 [Kg/s]), while the data I have been using has been obtained from an European Document for PEMFC automotive applications:
Attachment 100959
With this data you can get the inlet flows with the calculator included in the PEMFC module in Fluent for a desired current, for example:
Attachment 100960

I would apprecite some answers, thank you!
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