Investigation of Discrete Heating At Upper Section of A Porous Annulus

Heat transfer in porous medium is one of the important area of research from engineering and scientific point of view. The present research highlights the heat transfer characteristics in a vertical porous annulus having porous medium fixed between its inner and our radii. An upper section of the annuls is heated isothermally to constant temperature Tw and outer radius is cooled at lower temperature T∞. Finite Element Method is utilised to solve the governing partial differential equations. Two temperature model is used to represent thermal non-equilibrium among solid and fluid phases of porous medium. The study is conducted for different lengths of heater corresponding to the 20%, 35% and 50% of the total height of the cylinder.It is found that the average Nusselt number increases with increase in heater length.