NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER IN A CYLINDRICAL ENVELOPE WITH INTERNAL CONCENTRIC SLOTTED HOLLOW CYLINDER
- 1 October 1992
- journal article
- research article
- Published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications
- Vol. 22 (3) , 289-305
- https://doi.org/10.1080/10407789208944769
Abstract
A finite-volume approach is developed to numerically predict natural convection heat transfer in enclosures with isolated solid islands in the flow field. The computations were performed for the natural convection of air in a cylindrical envelope with an internal, concentric, slotted hollow cylinder for the range of Ra = - 103 – 106 and dimensionless slot width S = 0-0.5. The computed average equivalent thermal conductivities and the predicted flow patterns are compared with the experimental results available in the literature. It is found that for a fixed Rayleigh number there exists a critical slot width at which the total heat transfer rate reaches maximum.Keywords
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