Fluid Flow in Porous Electrodes

Reaction gases flow though the pores in GDL toward the reaction sites at the electrode-membrane interface. Simultaneous gas flow and reaction takes place in the region of the CL. Water produced at the electrode-membrane interface migrates through the porous layers to the gas flow channels. 

The mass continuity and momentum equations for the bulk fluid flow in a channel are significantly altered in a porous media owing to the presence of complex flow geometries. 

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