NATURAL CONVECTION HEAT TRANSFER IN A VERTICAL CONCENTRIC ANNULUS
Experiments were carried out to study the local and average heat transfer by natural convection in a vertical concentric cylindrical annulus. The experimental setup consists of an annulus has a radius ratio of 0.555 and inner cylinder with a heated length 1.2m subjected to the constant heat flux...
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Format: | Article |
Language: | English |
Published: |
University of Baghdad
2007-06-01
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Series: | Journal of Engineering |
Subjects: | |
Online Access: | https://www.joe.uobaghdad.edu.iq/index.php/main/article/view/2457 |
Summary: | Experiments were carried out to study the local and average heat transfer by natural convection in
a vertical concentric cylindrical annulus. The experimental setup consists of an annulus has a radius ratio
of 0.555 and inner cylinder with a heated length 1.2m subjected to the constant heat flux while the outer
cylinder is subjected to the ambient temperature. The investigation covers heat flux range from 58.2
W/m2
to 274.31 W/m2
. Results show an increase in the natural convection as heat flux increases leads to
an improve in the heat transfer process. An empirical equation of average Nusselt number as a function of
Raylieh number was deduced .
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ISSN: | 1726-4073 2520-3339 |