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Title: Forced convection heat transfer inside an anisotropic porous channel with oblique principal axes: Effect of viscous dissipation
Authors: Mobedi, Moghtada
Çekmer, Özgür
Pop, Ioan
Keywords: Anisotropic media
Fully developed flow
Internal forced convection
Viscous dissipation
Heat exchangers
Issue Date: Oct-2010
Publisher: Elsevier Ltd.
Source: Mobedi, M., Çekmer, Ö., and Pop, I. (2010). Forced convection heat transfer inside an anisotropic porous channel with oblique principal axes: Effect of viscous dissipation. International Journal of Thermal Sciences, 49(10), 1984-1993. doi:10.1016/j.ijthermalsci.2010.06.002
Abstract: An analytical study on laminar and fully developed forced convection heat transfer in a parallel-plate horizontal channel filled with an anisotropic permeability porous medium is performed. The principal axis of the anisotropic porous medium is oriented from 0 to 90 degrees. A constant heat flux is applied on the outer wall of the channel. Both clear (Newtonian) fluid and Darcy viscous dissipations are considered in the energy equation. Directional permeability ratio parameter A* is defined to combine both the effect of the dimensionless permeability ratio parameter K*=(K 1/K2) and orientation angle φ into one parameter. The effects of the parameter A*, the Darcy number Da and the modified Brinkman number Br* on the heat transfer and fluid flow characteristics in the channels are investigated and presented in graphs. The obtained results show that the parameters A*, Da and Br* have strong effects on the dimensionless normalized velocity and temperature profiles as well as on the Nusselt number. It is found that for a particular value of A*, called as critical value Acr*, the external heat applied to the surface of the channel is balanced by the internal heat generation due to viscous dissipation and the bulk mean temperature approaches the wall temperature. Hence, the Nusselt number approaches infinity for the critical values A cr*. © 2010 Elsevier Masson SAS. All rights reserved.
ISSN: 1290-0729
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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