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TECHNICAL PAPERS: Micro/Nanoscale Heat Transfer

Natural Convection in a Partitioned Vertical Enclosure Heated With a Uniform Heat Flux

[+] Author and Article Information
Kamil Kahveci

Faculty of Engineering and Architecture, Trakya University, 22030 Edirne, Turkeykamilk@trakya.edu.tr

J. Heat Transfer 129(6), 717-726 (Jun 19, 2006) (10 pages) doi:10.1115/1.2717241 History: Received December 02, 2005; Revised June 19, 2006

This numerical study looks at laminar natural convection in an enclosure divided by a partition with a finite thickness and conductivity. The enclosure is assumed to be heated using a uniform heat flux on a vertical wall, and cooled to a constant temperature on the opposite wall. The governing equations in the vorticity-stream function formulation are solved by employing a polynomial-based differential quadrature method. The results show that the presence of a vertical partition has a considerable effect on the circulation intensity, and therefore, the heat transfer characteristics across the enclosure. The average Nusselt number decreases with an increase of the distance between the hot wall and the partition. With a decrease in the thermal resistance of the partition, the average Nusselt number shows an increasing trend and a peak point is detected. If the thermal resistance of the partition further declines, the average Nusselt number begins to decrease asymptotically to a constant value. The partition thickness has little effect on the average Nusselt number.

Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

The geometry and the coordinate system

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Figure 2

The streamline and isotherm patterns for xp=0.5, rw=0.1, rk=1

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Figure 3

The streamline and isotherm patterns for xp=0.5, rw=0.1, rk=0.1

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Figure 4

The streamline and isotherm patterns for xp=0.5, rw=0.1, rk=0.01

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Figure 5

The streamline and isotherm patterns for xp=0.5, rw=0.3, rk=0.01

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Figure 6

The streamline and isotherm patterns for xp=0.3, rw=0.1, rk=0.01

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Figure 7

The streamline and isotherm patterns for xp=0.1, rw=0.1, rk=0.01

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Figure 8

The variation of the temperature for xp=0.5, rw=0.1, rk=0.01

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Figure 9

The variation of the temperature for xp=0.5, rw=0.1, Ra=105

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Figure 10

The variation of the temperature for xp=0.5, rk=0.01, Ra=105

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Figure 11

The variation of the temperature for rw=0.1, rk=0.01, Ra=105

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Figure 12

The variation of the local Nusselt number for xp=0.5, rw=0.1, rk=0.01

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Figure 13

The variation of the local Nusselt number for xp=0.5, rw=0.1, Ra=105

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Figure 14

The variation of the local Nusselt number for xp=0.5, rk=0.01, Ra=105

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Figure 15

The variation of the local Nusselt number for rw=0.1, rk=0.01, Ra=105

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Figure 16

The variation of the average Nusselt number for rw=0.1, rk=0.01

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Figure 17

The variation of the average Nusselt number for xp=0.5, rw=0.1

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Figure 18

The variation of the average Nusselt number for xp=0.5, rk=0.01

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