Conjugate heat transfer in porous annulus

Jagirdar, Salman Ahmed Khan and Kamangar, Sarfaraz and Badruddin, Irfan Anjum and Al-Rashed, Abdullah A. A. A. and Quadir, G. A. and Khaleed, H. M. T. and Yunus Khan, T. M. (2014) Conjugate heat transfer in porous annulus. Journal of Porous Media, 17 (12). pp. 1109-1119. ISSN 1934-0508

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Abstract

The effect of conductivity ratio on temperature at a solid-porous interface is one of the most important aspects in conjugate heat transfer. The present work is undertaken to investigate heat transfer behavior in a porous annular vertical cylinder having a solid wall at the inner surface The main objective ofthe present study is to evaluate the effect of solid wall thickness and conductivity ratio on heat transfer characteristics ofthe porous medium. The inner and outer surfaces of the annulus are maintained isothermally at Th and T∞ respectively, such that Th > T∞. The increase in conductivity ratio leads to an increase in temperature at the solid-porous interface. It is noticed that the temperature variation along the porous region is almost linear for higher values ofconductivity ratio and wall thickness ratio. It is found that the fluid velocity decreases with increase in wall thickness. It is observed that the Nusselt number decreases with increase in solid wall thickness. The effect ofthe aspect ratio is found to be negligible when porous conductivity is much higher than that of the solid wall conductivity. The attainment of the maximum Nusselt number at Ar ~1 in a porous annulus does not hold good for the conjugate heat transfer problem. The variation in Nusselt number is sensitive for higher wall thickness ratio and lower conductivity ratio.

Item Type: Article
Uncontrolled Keywords: Porous media, vertical annular cylinder, conjugate heat transfer, finite element method
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 14 Jan 2015 08:06
Last Modified: 22 Mar 2016 02:33
URI: http://shdl.mmu.edu.my/id/eprint/5934

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