The dot matrix of the existing large-scale flow field was broken into the dot matrix in the main channels and the dot matrix between the branch channels and the main channel

and the basic flow field with no dot matrix was improved. In order to explore how the dox matrix affects the flow distribution of the basic and the modified flow field

a two-dimensional steady laminar flow model was established to simulate the flow situation of the basic and the modified flow field after the dox matrix was added at different positions. The research results show that

the flow migration caused by the dot matrix is the main reason for the more uniform flow distribution in the large-scale flow field. After adding the complete dot matrix to the modified flow field

the flow uniformity is the best

and the flow velocity variance of the tributary channel is the lowest. The results have a certain significance effect on improving the durability and stability of fuel cells.