采用微观的拟颗粒模型研究了努森数在0.01~0.20范围内气体微通道流动的速度和温度分布.发现速度分布主要受努森数和所加外场力的影响,随努森数增加,壁面滑移速度先增后降,而温度分布也受外力场的显著影响.达西(Darcy)摩擦因子随努森数增大而增大,而它随马赫数的变化与所谓层流向湍流转捩提前的趋势相似. The micro-particle model was used to study the velocity and temperature distribution of the flow in the gas microchannels with a Knudsen number in the range of 0.01-0.20. The results show that the velocity distribution is mainly influenced by the Knudsen number and the applied field force. With the increase of Knudsen number, The slip velocity increases first and then decreases, and the temperature distribution is also significantly affected by the external force field. The Darcy friction factor increases with the increase of Knudsen number, and it changes with the so-called laminar turbulence The trend is similar in advance.