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分析了微矩形槽道内的不可压缩气体在速度滑移和温度跳跃区的流动和传热过程。在分析模型中 ,假定矩形槽道底面定热流加热 ,其余三面绝热 ,流动和换热均为充分发展 ,且处于滑移流动区。给出了截面上速度分布和温度分布的分析解 ,讨论了阻力特性和换热特性 ,并与实验结果作了比较。二者的吻合程度表明 ,在一定的Knudsen数范围内 ,传统的Navier Stokes方程和能量方程在考虑了速度滑移和温度跳跃影响后可以描述微矩形槽道内的气体流动和传热过程。
The flow and heat transfer process of incompressible gas in the micro-rectangular channel in velocity slip and temperature jump zone are analyzed. In the analysis model, it is assumed that the bottom surface of the rectangular channel is heated by constant heat flow, and the other three surfaces are adiabatically-developed, and their flow and heat transfer are well developed and are in a sliding flow area. The analytical solutions of velocity distribution and temperature distribution on the cross section are given. The resistance and heat transfer characteristics are discussed and compared with the experimental results. The agreement between the two shows that the traditional Navier Stokes equation and energy equation can describe the gas flow and heat transfer in the microchannel channel after considering the effects of velocity slip and temperature jump within a certain Knudsen number.