Flow and heat transfer characteristics in microchannel with pressure boundary conditions

The gaseous flow and heat transfer characteristics in micro-channel are examined using Direct Simulation Monte Carlo method with specified pressure boundary conditions. The variations of gaseous local pressure, temperature and number density along the channel caused by the temperature difference between wall and inflow are presented. The results show that temperature differences only happen at the inlet and outlet of the channel with different mechanisms. On the other aspect, both the gaseous compressibility and rarefaction will increase, and the pressure distribution along the channel becomes more nonlinear.