Effect of surface radiation on conjugate natural convection in a horizontal annulus driven by inner heat generating solid cylinder

Shaija, A and Narasimham, GSVL (2009) Effect of surface radiation on conjugate natural convection in a horizontal annulus driven by inner heat generating solid cylinder. In: International Journal of Heat and Mass Transfer, 52 (25-26). pp. 5759-5769.

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Abstract

This paper reports a numerical study of the laminar conjugate natural convection heat transfer with and without the interaction of the surface radiation in a horizontal cylindrical annulus formed between an inner heat generating solid circular cylinder and an outer isothermal circular boundary. Numerical solutions are obtained by solving the governing equations with a pressure correction method on a collocated (non-staggered) mesh. Steady-state results are presented for the flow and temperature distributions and Nusselt numbers for the heat generation based Grashof number ranging from 10(7) to 10(10), solid-to-fluid thermal conductivity ratios of 1, 5, 10, 50 and 100, radius ratios of 0.226 and 0.452 and surface emissivities of 0-0.8 with air as the working medium. It is observed that surface radiation reduces the convective heat transfer in the annulus compared to the pure natural convection case and enhances the overall Nusselt number.

Item Type:	Journal Article
Publication:	International Journal of Heat and Mass Transfer
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science.
Keywords:	Horizontal annuli; Volumetric heat generation; Non-staggered grid;Surface radiation; Radiation Nusselt number; Convection Nusselt number
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	04 Dec 2009 05:26
Last Modified:	19 Sep 2010 05:53
URI:	http://eprints.iisc.ac.in/id/eprint/25063

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