The　current　collector　offers　passages　for　mass　transport　and　is　one　of　the　key　components　of　the　passive　direct　methanol　fuel　cell　(DMFC).　The　effect　of　perforated　current　collector　design　on　mass　transport　is　studied　based　on　a　three-dimensional　(3D),　unsteady-state,　two-phase　mass　transport　model　of　a　passive　DMFC　cathode.　The　model　is　implemented　via　the　mixture　multiphase　model,　which　solves　the　continuity　and　momentum　equations　for　the　mixture　and　the　volume　fraction　equation　for　the　secondary　phases.　Numerical　results　indicate　that　the　distributions　of　oxygen　in　both　cathode　catalyst　layer　(CCL)　and　cathode　diffusion　layer　(CDL)　are　non-uniform　because　of　the　effect　of　the　perforated　current　collector　plate　(CCP)　structure.　Liquid　water　produced　by　an　electrochemical　reaction　in　the　CCL　accumulates　significantly　at　the　bottom.　Clearly,　the　distribution　of　liquid　water　in　the　cathode　catalyst　and　diffusion　layers　is　affected　by　gravity.　The　size　of　the　circular　holes　and　the　distance　between　them　are　taken　into　account　to　investigate　the　effect　of　the　CCP　structure.　Small　uniformly　arrayed　circular　holes　in　the　entire　active　area　of　CCP　are　advantageous　to　the　transfer　of　gas　and　liquid　water　in　the　cathode　side　of　a　passive　DMFC.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.