Theoretical investigations were performed on the developed laminar flow and convective heat transfer characteristics for incompressible
gases flow through rectanglar micropassages with constant wall heat flux. Mathematical models were proposed for considering
the change in viscosity and thermal conductivity of gas in the wall-adjacent region from the kinetic theory. The dimensionless
velocity distribution and corresponding pressure drop, the dimensionless temperature distribution and corresponding heat transfer
characteristics were both simulated numerically, and the results were compared to other report simulations 10–12] with brief
discussions.