Thermal analysis of natural convection and radiation in porous fins

被引：168

作者：

Gorla, Rama Subba Reddy ^{[1
]}

Bakier, A. Y. ^{[2
]}

机构：

[1] Cleveland State Univ, Dept Mech Engn, Cleveland, OH 44115 USA

[2] Assiut Univ, Dept Math, Assiut, Egypt

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2011年 / 38卷 / 05期

关键词：

Porous fins; Natural convection; Thermal analysis; HEAT-TRANSFER; OPTIMIZATION;

D O I：

10.1016/j.icheatmasstransfer.2010.12.024

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, the effects of radiation and convection heat transfer in porous media are considered. The geometry considered is that of a rectangular profile fin. The porous fin allows the flow to infiltrate through it and solid-fluid interaction takes place. This study is performed using Darcy's model to formulate heat transfer equation. To study the thermal performance, three types of cases are considered viz, long fin, finite length fin with insulated tip and finite length fin with tip exposed. The theory section addresses the derived governing equation. The effects of the porosity parameter S(h), radiation parameter G and temperature ratio C(T) on the dimensionless temperature distribution and heat transfer rate are discussed. The results suggest that the radiation transfers more heat than a similar model without radiation. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：638 / 645

页数：8

共 14 条

[1] Optimization of a thermally asymmetric convective and radiating annular fin [J].

Kang, H. S. ;

Look, D. C., Jr. .

HEAT TRANSFER ENGINEERING, 2007, 28 (04) :310-320

[2] Using porous fins for heat transfer enhancement [J].

Kiwan, S ;

Al-Nimr, MA .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2001, 123 (04) :790-795

[3] Predicting the thermal performance characteristics of staggered vertical pin fin array heat sinks under combined mode radiation and mixed convection with impinging flow [J].

Kobus, CJ ;

Oshio, T .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2005, 48 (13) :2684-2696

[4] Heat transfer from extended surfaces subject to variable heat transfer coefficient [J].

Mokheimer, EMA .

HEAT AND MASS TRANSFER, 2003, 39 (02) :131-138

[5] Prediction of the temperature in a fin cooled by natural convection and radiation [J].

Mueller, D. W., Jr. ;

Abu-Mulaweh, H. I. .

APPLIED THERMAL ENGINEERING, 2006, 26 (14-15) :1662-1668

[6]

Nguyen A, 1992, HEAT MASS TRANSFER, V27, P67

[7]

Popiel CO, 2007, HEAT TRANSFER ENG, V26, P299

[8] FIN GEOMETRY FOR MINIMUM ENTROPY GENERATION IN FORCED-CONVECTION [J].

POULIKAKOS, D ;

BEJAN, A .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1982, 104 (04) :616-623

[9] Experimental study of free convection and radiation in horizontal fin arrays [J].

Rao, VR ;

Venkateshan, SP .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1996, 39 (04) :779-789

[10] Optimum dimensions of convecting-radiating fins: Part I - longitudinal fins [J].

Razelos, P ;

Kakatsios, X .

APPLIED THERMAL ENGINEERING, 2000, 20 (13) :1161-1192

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