Ahstraet--A numerical study of combined heat and mass transfer by natural convection adjacent to vertical surfaces situated in fluid-saturated porous media is reported. Special attention is given to opposing buoyancy effects of the same order and unequal thermal and species diffusion coefficients. T
Effect of porosity on natural convective heat transfer in a fluid saturated porous medium
โ Scribed by P. Nithiarasu; K.N. Seetharamu; T. Sundararajan
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 143 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0142-727X
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โฆ Synopsis
The eect of porosity on natural convective ยฏow and heat transfer in a ยฏuid saturated porous medium has been investigated using Galerkin's ยฎnite element method. A generalised non-Darcy ยฏow model with porosity as a separate parameter is used. Results indicate that the non-Darcy regime is highly sensitive to porosity changes. A variation of the order of 40% in the average Nusselt number is possible with change in the porosity, for the Rayleigh and Darcy number ranges considered.
๐ SIMILAR VOLUMES
Presented here are the results of a numerical study of natural convection heat transfer in a stably stratified, fluid saturated low porosity medium, in which Darcy flow prevails. In this investigation, the boundary layer approximations are discarded and a wide range of ambient thermal stratification
The convective heat transfer analysis in a channel embedded in a power-law fluid saturated porous medium subject to uniform heat flux is presented and compared with a Newtonian fluid concerning the effects of viscous dissipation. Governing momentum and energy equations for non-Newtonian fluids which