Abstract:- Convective heat transfer is more when fins are used suitably, since the contact surface area for heat transfer increases, recently fin design is considered for improving the heat transfer and many investigations have been done recently and types fins are used and different shapes and various materials are tried to know the effect of heat transfer and improve it for better shape and material for greater rate of heat transfer. By increasing the surface area we can increase the heat dissipation rate. This will help to determine better geometry and materials for fins to achieve better heat transfer coefficient. Fins are integral part of any heating or cooling system. Our prime objective is to obtain optimum heat transfer rate which will result in producing highly efficient fins. A fin is a surface that extends from an object to increase the rate of heat transfer to or from the environment by increasing convection. Pin fins are broadly utilized as a part of heat exchanging body which result in enhancing the heat exchange between the surface of the body and ambient fluid by doing thermal analysis on the fins, it is helpful to know the heat dissipation and rate of heat transfer in different types of fins.Keywords: - Heat transfer, thermal analysis, geometry, Fluid Flow, Heat Transfer Rate, Fin.