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CFD Analysis of conjugate natural convection in a vertical annulus

Reddy, Venkata P and Narasimham, GSVL and Rao, SV Raghurama and Johny, T and Kasiviswanathan, KV (2008) CFD Analysis of conjugate natural convection in a vertical annulus. In: International Journal of Computational Methods, 5 (1). pp. 63-89.

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Conjugate natural convection in a vertical annulus with a centrally located vertical heat generating rod is studied numerically. The governing equations are discretized on a staggered mesh and are solved using a pressure-correction algorithm. A parametric study is performed by varying the Grashof number, aspect ratio, and the solid-to-fluid thermal conductivity ratio over wide ranges with the Prandtl number fixed at 0.7. Results are presented for the variation of several quantities of interest such as the local Nusselt numbers on the inner and outer boundaries, the axial variation of the centerline and interface temperatures, maximum solid, average solid and average interface temperature variations with Grashof number, and the average Nusselt number variation for the inner and outer boundaries with Grashof number. The average Nusselt number from the conjugate analysis is found to be between the Nusselt numbers of the isothermal and the isoflux cases. The average Nusselt numbers on the inner and outer boundaries show an increasing trend with the Grashof number. Correlations are presented for the Nusselt number and the dimensionless temperatures of interest in terms of the parameters of the problem.

Item Type: Journal Article
Publication: International Journal of Computational Methods
Publisher: World Scientific
Additional Information: Copyright of this article belongs to World Scientific.
Keywords: Conjugate natural convection;vertical annulus;nuclear fuel casks.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 10 Jul 2009 10:52
Last Modified: 10 Jul 2009 10:52
URI: http://eprints.iisc.ac.in/id/eprint/21341

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