MIXED CONVECTION HEAT TRANSFER IN AN ANISOTROPIC POROUS MEDIUM WITH OBLIQUE PRINCIPAL AXES

    Authors

    K. Vajravelu;K. V. Prasad

    Comments

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    Abbreviated Journal Title

    J. Mech.

    Keywords

    Anisotropic porous media; Darcy viscous dissipation; Variable fluid; properties; Second order finite difference method; LATERAL MASS FLUX; NATURAL-CONVECTION; VERTICAL CHANNEL; VISCOUS; DISSIPATION; VARIABLE VISCOSITY; FORCED-CONVECTION; OPPOSING BUOYANCY; BOUNDARY-LAYERS; FLOW; PERMEABILITY; Mechanics

    Abstract

    In this paper, a numerical study is carried out to investigate the mixed convection flow and heat transfer in a parallel-plate channel with an anisotropic permeable porous medium. The principal axis of the porous medium is orientated in a direction which is oblique to the gravity vector. Both clear (Newtonian) fluid dissipation and Darcy viscous dissipation are considered in the heat transport equation. In this model, the temperature dependent fluid properties are considered and their influence on the flow and heat transfer characteristics is brought out. The governing non-linear equations (in non-dimensional form) are solved numerically by a second order finite difference scheme. The directional permeability ratio A(1) is defined to combine the effects of the permeability ratio parameter K-* = (K-1/K-2) and the orientation angle Phi(1). The effects of the anisotropic permeability ratio, the orientation angle of the principal axis, and the temperature dependent variable properties on the mixed convection flow and heat transfer are investigated. It is demonstrated that both the anisotropic permeability of the porous medium and the variable transport properties have strong effects on the flow and heat transfer characteristics.

    Journal Title

    Journal of Mechanics

    Volume

    30

    Issue/Number

    4

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    327

    Last Page

    338

    WOS Identifier

    WOS:000339698300001

    ISSN

    1727-7191

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