NATURAL-CONVECTION IN OPEN-ENDED CAVITIES WITH A POROUS OBSTRUCTING MEDIUM

被引：23

作者：

ETTEFAGH, J

VAFAI, K

机构：

[1] Dep of Mechanical Engineering,, Columbus, OH, USA, Dep of Mechanical Engineering, Columbus, OH, USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 1988年 / 31卷 / 04期

关键词：

POROUS MATERIALS - Heat Transfer;

D O I：

10.1016/0017-9310(88)90127-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The buoyancy-driven convection in an open-ended cavity with an obstructing medium such as a porous material is analyzed in this work. The numerical results of the flow and temperature fields for the range of Darcy-Rayleigh number, Ra less than equivalent to 350 are given. The importance of external corners in vorticity generation and flow instability augmentation is discussed. The presence of 'humps' as well as the periodic behavior in the variation of the Nusselt number with time are studied. The effects of important variables such as the aspect ratio, the temperature difference, and the Darcy-Rayleigh number on the flow field and the cavity Nusselt number are investigated. Comparisons are also made with previously reported studies of natural convection in a cavity filled with a porous medium.

引用

页码：673 / 693

页数：21

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