| Summary: | Computational finite element method employing Galerkin’s method of weighted
residuals has been used to analyze free convection heat transfer in axisymmetric porous
medium saturated by fluid. The approach is used to study the effect of aspect ratio (0.6 –
8), radius ratio (0.1 – 10) and Rayleigh number range from 10 – 100 on the average
Nusselt number, Nu in the case of porous cylindrical annulus.
Three cases are studied here: isothermal wall temperature, power law temperature
variation on both inner or outer wall and convective boundary on outer wall. The power
law index for the power law temperature variation is ranges from 0.25 – 1.00. With
convective boundary at the outer wall of the axisymmetric porous medium, heat transfer
coefficient of 0.01 – 100 (W/m2
.K) is taken into the study for the effect on the average
Nusselt number.
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