平板通道中热局部非平衡对努塞尔数的影响  

Effect of local thermal non-equilibrium on Nusselt number in convection at a plate channel

作　　者：何录武[1] 杨骁[2] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]上海大学土木工程系,上海200072

出　　处：《华中科技大学学报（自然科学版）》2007年第7期122-125,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10272070)

摘　　要：利用傅里叶级数,研究了多孔介质平板通道中Darcy流体热局部非平衡对努塞尔数的影响.考虑流体流动方向的热传导以及固相和流相相互作用的粘性耗散,根据热局部非平衡的两能量方程模型,得到了常壁温时多孔介质固相骨架温度和孔隙流体温度的解析解.针对不同的物性参数,给出了局部努塞尔数的分布特征.通过参数研究,揭示了热局部非平衡时强迫对流努塞尔数的响应特征.Abstract. Based on the Darcy fluid model and the two energy equations, taking into account of viscous dissipation due to the interaction between solid skeleton and pore fluid flow as well as the effect of thermal conduction in the direction of the fluid flow, the effect of local thermal non-equilibrium on Nusselt number for the thermally developing forced convection in a saturated porous parallel plate channel, with walls held at constant temperature, was investigated. The analytical expressions of temperatures of the solid skeleton and pore fluid were obtained by means of Fourier series. The behavior of Nusseh number for the local thermal non-equilibrium forced convection was revealed by the parameters study. The distributions of the Nusselt number are also shown in figures.

关 键 词：多孔介质 发展传热强迫对流 热局部非平衡 努塞尔数 

分 类 号：O357.3[理学—流体力学]