Natural convection in an enclosure containing a sinusoidally heated cylindrical source

被引：52

作者：

Roslan, R. ^{[1
]}

Saleh, H. ^{[2
]}

Hashim, I. ^{[2
,3
]}

Bataineh, A. S. ^{[4
]}

机构：

[1] Univ Tun Hussein Onn Malaysia, Fac Sci Technol Ea Human Dev, Parit Raja 86400, Johor, Malaysia

[2] Univ Kebangsaan Malaysia, Sch Math Sci, Ukm Bangi 43600, Selangor, Malaysia

[3] Univ Kebangsaan Malaysia, Solar Energy Res Inst, Ukm Bangi 43600, Selangor, Malaysia

[4] Al Balqa Appl Univ, Fac Sci, Dept Math, Salt 19117, Jordan

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2014年 / 70卷

关键词：

Natural convection; Square enclosure; Inner cylinder; SQUARE ENCLOSURE; CIRCULAR-CYLINDER; FLUID-FLOW; ANNULUS; CAVITY;

D O I：

10.1016/j.ijheatmasstransfer.2013.10.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The problem of unsteady natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder is studied in this paper. The cylinder temperature is assumed to vary sinusoidally with time about a fixed mean temperature. The coupled momentum and energy equations have been solved numerically over a wide range of values of the amplitude and the frequency of the source temperature signal, as well as the source radius. It is found that the heat transfer rate tends to increase by oscillating the source temperature signal. The maximum heat transfer augmentation was obtained for frequency between 25 pi and 30 pi for a high amplitude and a moderate source radius. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：119 / 127

页数：9

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