Heat transfer by radiation and natural convection through a vertical annulus embedded in porous medium

被引：106

作者：

Badruddin, IA

Zainal, ZA

Narayana, PA

Seetharamu, KN

机构：

[1] School of Mechanical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang

[2] MS Ramaiah School of Advanced Studies, Bangalore 560 054, New BEL Road

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2006年 / 33卷 / 04期

关键词：

Convection; FEM; Heat transfer; Porous medium; Radiation; Vertical annulus;

D O I：

10.1016/j.icheatmasstransfer.2006.01.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effect of radiation and natural convection in a saturated porous medium embedded in a vertical annular cylinder has been investigated. Finite element method has been used to solve the governing equations. Influence of aspect ratio (A) and radius ratio (R) on Nusselt number is presented. The effect of radiation on heat transfer behavior is discussed. Results for two limiting cases of vertical cylinder and vertical plate embedded in saturated porous medium are presented. It is seen that average Nusselt number (Nū) increases significantly with radiation parameter (Rd). Nū attains maximum value at an aspect ratio of around one. Nū always decreases with decrease in radius ratio. © 2006 Elsevier Ltd. All rights reserved.

引用

页码：500 / 507

页数：8

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