NUMERICAL ANALYSIS OF FORCED CONVECTION ENHANCEMENT INSIDE SINUSOIDAL WAVY CHANNELS FULLY FILLED WITH POROUS MEDIA

Forced convection heat transfer and fluid flow characteristics were numerically investigated inside wavy walled channels fully filled with homogeneous porous material. The effect of the amplitude and wavelength of the sinusoidal wavy surface was also studied for two models of wavy channels and compared to the flat-plate channel. The governing equations were solved on a nonorthogonal grid, which is generated by Poisson elliptic equations, based on the ADI method. The results showed that the surface waviness gives an increase in heat transfer compared to the flat surface, but not for all the cases of study. Hence, wavelength shortening reduces the rate of heat transferred especially for the small values of amplitude. Furthermore, the highest possible percentage of enhancement in heat transfer for the current study was about 18%.