Mixed convection from two thermal sources in a vertical porous layer

Abstract In this paper the steady mixed convection flow adjacent to a vertical surface embedded in a fluid-saturated porous medium, on which two isolated thermal sources are located is investigated theoretically. The thermal sources are taken as long planar sources of finite height and the resulting two-dimensional flow is numerically studied using the finite volume method. The nature and the basic characteristics of the mixed aiding as well as mixed opposing flows that arise are investigated using the Darcy law model. The governing parameters are the Rayleigh number, Peclet number, separation distance between heated elements, their lengths and heat flux ratio in additional to the external flow direction. These parameters are varied over wide ranges and their effect on the heat transfer characteristics is studied in detail.

[1]  N. H. Saeid,et al.  Analysis of mixed convection in a vertical porous layer using non-equilibrium model , 2004 .

[2]  Vishwanath Prasad,et al.  Mixed convection in horizontal porous layers heated from below , 1988 .

[3]  A. Bejan,et al.  Convection in Porous Media , 1992 .

[4]  F. Kulacki,et al.  Mixed Convection in Saturated Porous Media , 1991 .

[5]  S. Patankar.  Numerical Heat Transfer and Fluid Flow , 2018, Lecture Notes in Mechanical Engineering.

[6]  Y. Jaluria.  Mixed convection flow over localized multiple thermal sources on a vertical surface , 1986 .

[7]  F. Kulacki,et al.  Aiding and opposing mixed convection in a vertical porous layer with a finite wall heat source , 1988 .

[8]  A. Bejan,et al.  Heat transfer handbook , 2003 .

[9]  Ephraim M Sparrow,et al.  Advances in Numerical Heat Transfer , 1996 .

[10]  Ibrahim Dincer,et al.  Porous and Complex Flow Structures in Modern Technologies , 2004 .

[11]  Toshiyuki Hayase,et al.  A consistently formulated QUICK scheme for fast and stable convergence using finite-volume iterative calculation procedures , 1992 .

[12]  Cheng Ping,et al.  Combined free and forced convection flow about inclined surfaces in porous media , 1977 .

[13]  B. Armaly,et al.  Mixed convection along a nonisothermal vertical flat plate embedded in a porous medium: The entire regime , 1993 .

[14]  C. Choi,et al.  Free and mixed convection in horizontal porous layers with multiple heat sources , 1990 .

[15]  Sadik Kakaç,et al.  Convective heat and mass transfer in porous media , 1991 .

[16]  A. Bejan,et al.  Emerging technologies and techniques in porous media , 2004 .

[17]  I. Pop,et al.  Convective Heat Transfer: Mathematical and Computational Modelling of Viscous Fluids and Porous Media , 2001 .