Unsteady Darcian Natural Convection within Porous Media of Square Enclosure at Various Rayleigh Numbers

Ali Hooshyar Faghiri; Hikmet Şeli Aybar; Mehrdad Khamooshi

doi:10.4028/www.scientific.net/AMM.390.18

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 390Unsteady Darcian Natural Convection within Porous...

Unsteady Darcian Natural Convection within Porous Media of Square Enclosure at Various Rayleigh Numbers

Abstract:

Transient natural convection within a 2D square cavity filled with a porous medium is numerically investigated. The left wall is suddenly heated to a constant temperature T_h, while the right wall is suddenly cooled to a constant temperature T_c. Both the horizontal walls are insulated. The Finite Volume numerical method is used to solve the dimensionless governing equations. The results are obtained for the initial transient state assuaging to the steady state, and for Rayleigh number values of 10²–10⁴. It is indicated that the average Nusselt number showing an undershoot during the transient period and that the time needed to reach the steady state is longer for low Rayleigh number and shorter for high Rayleigh number.

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Applied Mechanics and Materials (Volume 390)

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18-22

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https://doi.org/10.4028/www.scientific.net/AMM.390.18

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Online since:

August 2013

Authors:

Ali Hooshyar Faghiri, Hikmet Şeli Aybar, Mehrdad Khamooshi

Keywords:

Darcian Convection, Porous Medium, Rayleigh Number, Square Enclosure

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