the efficacy of novel designs on the proficiency of polymer exchange membrane fuel cell

Numerical simulation is extensively used in the many industries to investigate transport phenomena inside channels with variant dimensions to save time and cost.  in this paper, novel designs for cylindrical polymer fuel cell in the numerical and threedimensional form are presented. in the simulation of these models, finite volume method is used. thereafter, novel designs are used to increase the proficiency of polymer electrolyte fuel cell. in this study at first, the effect of semicircular prominent gas diffusion layers is studied. by locating these prominences on gas diffusion layers, this fact is observed that the performance of fuel cell is enhanced in same condition. however, the optimum size of the prominences is also investigated in the present work. by reaching the magnitude of the radius to 0.55 mm, the flow velocity exceeds the desired magnitude. by this way the diffusion of species impressed negatively. then, the effect of gradual changes in crosssection, the geometrical configuration of cell parts on species diffusion, the output current density is put under careful study. the results displayed the optimal performance is belong to the cylindrical fuel cell with elliptical crosssection. wider transport region and lower drop quantity in identical volume for reactive gases to pass to the reactive domain are the reasons for optimal function.