气流在单壁面等温平行平板微槽道内完全发展层流换热

Laminar heat transfer of gas in extremely narrow parallel plates with one wall temperature constant and the other adiabatic

基于贴壁层模型和贴壁层内气体粘度与导热系数的变化规律 ,求解了平行平板微槽道内气体完全发展的二维层流换热 ,得到了一壁面绝热、一壁面等壁温的平行平板微槽道内的无量纲温度分布和对流传热系数 ,并与常热流边界条件下的求解结果作了比较 .

The wall adjacent layer effect on the convective heat transfer for incompressible developed laminar flow of gas through parallel plates micropassage with one wall temperature constant and the other adiabatic was analyzed theoretically in this paper. Considering the change in thermal conductivity and viscosity of gas in wall adjacent region from the kinetic theory, mathematical models were built and the dimensionless temperature distribution and the corresponding heat transfer characteristics were simulated numerically. The results indicate that the laminar heat transfer coefficient of gas through this kind of micropassages is less than that of the larger passages, while the dimensionless temperature is higher than that of larger passages. And the results were compared with those of the former researches.