NATURAL CONVECTION HEAT TRANSFER IN A VERTICAL CONCENTRIC ANNULUS

Main Article Content

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/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 .

Article Details

How to Cite
“NATURAL CONVECTION HEAT TRANSFER IN A VERTICAL CONCENTRIC ANNULUS ” (2007) Journal of Engineering, 13(02), pp. 1417–1427. doi:10.31026/j.eng.2007.02.07.
Section
Articles

How to Cite

“NATURAL CONVECTION HEAT TRANSFER IN A VERTICAL CONCENTRIC ANNULUS ” (2007) Journal of Engineering, 13(02), pp. 1417–1427. doi:10.31026/j.eng.2007.02.07.

Publication Dates

References

Akeel Abdullah Mohammed An Investigation into laminar combined convection heat transfer through concentric annuli. Ph. D. Thesis, University of Technology, Mech. Eng. Dept., 2005.

Glakape, E. K., Watkins C. B. , Jr., and Cannon, J. N. Constant heat flux solutions for natural convection between concentric and eccentric horizontal cylinders. Numerical Heat Transfer, 1986, 10, 279-295

Kueehn, T. H. and Goldstein, R. J. An experimental and theoretical study of natural convection in the annulus between horizontal concentric clinders. J. Fluid Mech., 1976, 74, 695-719

Kueehn, T. H. and Goldstein, R. J. An experimental study of natural convection heat transfer in concentric and eccentric horizontal cylindrical annuli, ASME J. Heat Transfer, 1978, 100, 635-640

Rao, Y. F., Miki,K. , Fukuda, K. , and Katata, Y. Flow pattern of natural convection in horizontal cylindrical annuli. Int. J. Heat Mass Transfer, 1985, 28, 705-714

Van de Sande, E. and Hamer, B. J. G. Steady and transient natural convection in enclosures between horizontal circular cylinders (constant heat flux). Int. J. Heat Mass Transfer, 1979, 22, 361-370

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