The channel geometry of the bipolar plate in the proton exchange membrane fuel cell (PEMFC) significantly influences its performance. In this study, a bio-emulated flow field (BEFF) pattern in the bipolar plate was used based on the external carotid artery design with its branches. A comprehensive investigation was conducted using a three-dimensional (3-D) multiphase computational fluid dynamics (CFD) model on bio-emulated flow fields with branch channels of zero (BE-0), six (BE-6), and ten (BE-10). The results obtained were compared with traditional parallel flow fields (TPFF) and traditional serpentine flow fields (TSFF). The BE-10 results showed reduced pressure drop, uniform distribution of reactants, and higher power output compared with other configurations. The peak power density of BE-10 surpassed that of TPFF by approximately 45.07% and exceeded BE-0 by 10.39%. The novel BEFF structure with an increase in branch channels showed that the reactants, temperature, and static pressure distribution are more uniform with better water management.
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