具有移动边界平行平板通道内的层流对流换热

采用贴体坐标系来处理复杂边界，在同位网格中利用SIMPLE算法实现速率场与压力场的耦合，求解了平行平板通道一侧带有移动边界的层流对流换热问题，计算结果表明，换热量发生极值的时刻并不与移动边界移动到极值位置的时刻相对应，而是有一定的相位差，表征运动周期的Sr及运动边界的振幅对通道的换热量具有显著影响，但在相同的时段内，Sr对于壁面总换热量的影响较小，运动边界的振幅对壁面总换热量的影响显著，另外，由于边界的移动，上，下壁面的换热均得到了强化。

Numerical Investigation of Laminar Convective Heat Transfer in Parallel Channel with One Moving Boundary

A method is presented in detail that can be used to solve the fluid flow and heat transfer in parallel channel with one moving boundary. The primitive variables formulation was adopted and a nonstaggered body fitted grid system was used with Cartesian velocity components used as the primary unkowns in the momentum equations. The well known SIMPLE algorithm is employed to handle the velocity pressure coupling. The results show that the moving boud nary has great effects on the wall convective heat transfer. Both the moving period and amplitude affect the heat tranfer rate of the side walls to some extent. However, in a given time period, the moving amplitude greatly affects the heat transfer amount while the Strouhal number only has a little influence on it. It is also found that the heat fluxes of the two walls increase because of the behavier of the moving boundary.