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Natural Convection Heat Transfer from a Plane Wall to Thermally Stratified Porous Media

The thermal and fluid transport phenomena adjacent to a plane wall in a stable, thermally stratified saturated porous medium is investigated numerically and experimentally in the present work. Glass bead is taken as porous material with diameter (12mm). The temperature distribution and Nusselt number are discussed numerically (Fluent Program) and experimentally for different values of heat flux (150, 250, 500, 750, 1000, 1250 W/m), thermal stratification (0,-0.6,0.8,-1.6,-2,-5,-10) and inclination angles (0,-15, 15, 30, 45deg). It is observed that the temperature distribution is affected strongly by thermal stratification where it increases when thermal stratification decreases and it is unaffected strongly by the inclination angles. Also the results show that the Nusselt number varies linearly with downstream coordinate (X) and increases with decreasing stratification parameter.