恒温平行板间多孔介质通道中的分层耗散流动  

Laminar Dissipative Flow in a Porous Channel Bounded by Isothermal Parallel Plates

作　　者：K.霍曼 M.哥济-邦德培 吴承平 

机构地区：[1]马赞达冉大学机械工程系

出　　处：《应用数学和力学》2005年第5期541-546,共6页Applied Mathematics and Mechanics

摘　　要：　利用Darcy模型,研究了平行板间充填饱和多孔介质的通道中,在热量入口处传热的粘性耗散效应·　讨论了等温边界情况·　求得热量入口处局部温度和体积计算平均温度随Nusselt数的分布·　给出了独立于Brimkman数的经充分发展的Nusselt数应为6·　并观察到,若忽略粘性耗散影响,将导致熟知的内流现象,此时Nusselt数等于4.The effects of viscous dissipation on thermal entrance heat transfer in a parallel plate channel filled with a saturated porous medium,is investigated analytically on the basis of a Darcy model.The case of isothermal boundary is treated.The local and the bulk temperature distribution along with the Nusselt number in the thermal entrance region were found.The fully developed Nusselt number,independent of the Brinkman number, is found to be 6.It is observed that neglecting the effects of viscous dissipation would lead to the wellknown case of internal flows,with Nusselt number equal to 4.93.A finite difference numerical solution is also utilized.It is seen that the results of these two methods_ analytical and numerical_are in good agreement.

关 键 词：传热 NUSSELT数 强迫对流 多孔介质 粘性耗散 

分 类 号：O357.3[理学—流体力学]