Commercial　fuel　cell　stacks　often　have　a　large　electrode　area　to　obtain　a　high　power　output.　Uniformity　in-plane　distribution　of　vital　physical　quantities　plays　a　key　role　in　improving　cell　performance　and　avoiding　degradation.　In　this　study,　a　three-dimensional　two-fluid　multiphase　model　is　adopted...