带间断性矩肋的平行平板通道中三维流动与换热的数值模拟

1数学描述与计算方法周期性变化的几何结构是广泛应用的一种强化换热形式＊‘］。文献中有关的数值研究多限于二维清形，三维的研究相对较少。本文针对沿流向周期性布置矩肋的平行平板通道，对层流周期性充分发展的流动与换热进行了三维数值模拟。计算单元如图1所示。对于不可压缩流体，忽略体积力时的控制方程为：图1矩助通道计算单元表1式（l）中各乡变量的含义式中d取不同值的对应关系见表1。设通道几何周期长度为S，则对充分发展状态的计算单元进出边界有如下关系：据文献＊，周期性充分发展流动的压力可以分解为两部分：式中o为一个周…

NUMERICAL SIMULATION ON THE HEAT TRANSFER AND FLUID FLOW IN THE MRALLEL-PLATE CHANNELS WITH LONGITUDINAL FIN ARRAYS

The heat transfer and fluid flow in the parallel-plate channels with transverse fin arrayswas investigated numerically. The influences of the configuration and the thermal conduc-tivity of the fin on the characteristics of heat transfer and fluid flow were considered. It wasfound that in the range of Re = 300 ~ 800, the heat transfer of the channels was enhancedgreatly compared with the smooth channel. Small fin thermal conductivity will deterioratethe ability of enhancing heat transfer.