NATURAL CONVECTION IN ENCLOSED POROUS MEDIA WITH RECTANGULAR BOUNDARIES
NATURAL CONVECTION IN ENCLOSED POROUS MEDIA WITH RECTANGULAR BOUNDARIES
复制标题
DOI：
10.1115/1.3449641
复制
发表时间：
1970-01-01
期刊：
影响因子：
--
通讯作者：
BARRY, JM
中科院分区：
文献类型：
--
作者：
CHAN, BKC;IVEY, CM;BARRY, JM
数值方法用于求解不同温度下充满气体且以平面矩形表面为界的多孔介质中的传热场方程。结果以理论流线和等温线形式呈现。由此，可以获得与自然对流相对应的传热速率的相对增加，作为三维无维参数的函数：达西数 Da、瑞利数 Ra 和几何纵横比 L/D。对于大于约 40 的 Da Ra，提出了使用集总参数 Da Ra 的可能相关性。
Numerical methods are used to solve the field equations for heat transfer in a porous medium filled with gas and bounded by plane rectangular surfaces at different temperatures. The results are presented in terms of theoretical streamlines and isotherms. From these the relative increases in heat transfer rate, corresponding to natural convection, are obtained as functions of three-dimensionless parameters: the Darcy number Da, the Rayleigh number Ra, and a geometric aspect ratio L/D. A possible correlation using the lumped parameter Da Ra is proposed for Da Ra greater than about 40.