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Natural convection in a finite wall rectangular cavity filled with an anisotropic porous medium

1994; Elsevier BV; Volume: 37; Issue: 2 Linguagem: Inglês

10.1016/0017-9310(94)90101-5

1879-2189

Wen-Jeng Chang, Lin Hui-Chuan,

Phase Change Materials Research

A numerical study has been made to analyze the wall conduction effect on the natural convection in an anisotropic fluid-saturated porous medium filled in a rectangular cavity. The governing conservation equations are solved by a SIMPLE algorithm. The numerical results indicate that the anisotropic permeability influences the flow field and heat transfer rate significantly. A critical value of the anisotropic thermal diffusivity ratio may exist such that the Nusselt number reaches a minimum. This critical value decreases with increasing the value of the anisotropic permeability ratio. Moreover, wall conductance effect can lead to large changes in the Nusselt numbers.