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Natural Convection Heat Transfer in a Vertical Concentric Annulus | ||
| Journal of Engineering | ||
| Article 1, Volume 13, Issue 2, 2007, Pages 1417-1427 | ||
| Author | ||
| Akeel A. Mohammed | ||
| Abstract | ||
| 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/m^2 to 274.31 W/m^2. 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 . | ||
| Keywords | ||
| heat transfer; Natural Convection; Concentric Annulus | ||
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