Abstract Aiming at the flow characteristics of methane/moist-air laminar boundary layer in the millimeter micro channels , this paper solved the governing equation by Matlab programming and researched two kinds of micro channels' boundary layer properties under three different conditions.The two micro channels are micro plate and micro circular tube,the spacing between two plates and the diameter of the circular tube are both 1 mm,with the length both 40mm. The influences of air/carbon mole ra ...