Design of electrical or electronic component in the present situation is getting more compact sizes, which gives results in heat generation. Reduced the life of component because this unnecessary heat generation. To reduce this problem there is a necessity of an efficient cooling system. Extended surface heat sink is one of the most popular heat sink techniques. To improve its efficiency, there are number of conventional methods available but only a few of them such as changing the shape of cross section of baffles, changing the baffles inclination with walls and baffles arrangement and using metallic foam of high conductivity like that aluminium foam material which gives good results individually. Solid baffles gives lower heat transfer rate as compare to metallic foam baffles. Across the channel pressure drop of metallic foam baffles is less as compare to solid baffles. To increase heat transfer rate the turbulence occurred is good enough due to porosity.