过程参数描述的等壁温平行平板间层流对流换热特性

摘要

传热过程中的过程参数为傅立叶定律定义的热通量.对等壁温平行平板间层流对流换热进行过程参数描述，揭示了壁面上和流体内部流动速度和速度梯度对对流换热的贡献.结果表明：如果把传热过程以过程参数进行描述可以获得对传热的深刻表述和理解.%The process parameter of heat transfer is heat flux defined by Fourier law. In this paper,the characteristics of laminar convective heat transfer between parallel planes with uniform wall temperature are studied under process parameter description. With this description, the effects of velocity and velocity gradient on convective heat transfer on the wall surface and inside flow region can be divided. The results show that when the heat transfer is described by process parameter, the deeper understanding on convective heat transfer can be obtained.