To further improve the performance of the Proton Exchange Membrane Fuel Cell (PEMFC). in this paper. we designed a blocked flow channel with trapezoidal baffles. and geometric parameters of the baffle were optimized based on CFD simulation. https://www.roneverhart.com/Western-Digital-Ultrastar-DC-HC550-WUH721816ALE6L0-0F38460-16TB-7-2K-RPM-SATA-6Gb-s-512e-ISE-3-5in-Hard-Drive/