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TECHNICAL BRIEFS

Boundary Condition Dependent Natural Convection in a Rectangular Pool With Internal Heat Sources

[+] Author and Article Information
Seung Dong Lee, Jong Kuk Lee

Department of Nuclear Engineering, Seoul National University, San 56-1 Sillim-dong, Gwanak-gu, Seoul 151-742, Korea

Kune Y. Suh1

Department of Nuclear Engineering, Seoul National University, San 56-1 Sillim-dong, Gwanak-gu, Seoul 151-742, Koreakysuh@snu.ac.kr

1

Corresponding author

J. Heat Transfer 129(5), 679-682 (May 21, 2006) (4 pages) doi:10.1115/1.2424238 History: Received July 26, 2005; Revised May 21, 2006

This paper presents results of steady-state experiments concerned with natural convection heat transfer of air in a rectangular pool in terms of the Nusselt number (Nu) versus the modified Rayleigh number (Ra) varying from 109 to 1012. Cartridge heaters were immersed in the working fluid to simulate uniform volumetric heat generation. Two types of boundary conditions were adopted in the test: (I) top cooled, and (II) top and bottom cooled. The other sides were kept insulated. In the case of boundary condition II, the upward heat transfer ratio, Nuup(Nuup+Nudn), turned out to be 0.7–0.8 in the range of Ra between 1.05×1010 and 3.68×1011.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Upward natural convection heat transfer with isothermal upper wall and insulated lower wall (10,12-13,17,23-24)

Grahic Jump Location
Figure 2

Upward natural convection heat transfer with isothermal upper and lower walls

Grahic Jump Location
Figure 3

Downward natural convection heat transfer with isothermal upper and lower walls

Grahic Jump Location
Figure 4

Schematic diagram of SIGMA RP test loop

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