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Many of the engineering applications are subjected to high temperature and thermal stresses. In order to cool those fins are used to dissipate the heat from the surfaces. Fins are generally used to increase the heat transfer rate from the system to the surroundings. By doing computational flow analysis of cooling fins, it is helpful to know about the heat dissipation rate. In this analysis, the fins are modified by putting different types of notches and are of same material. The proposed work is mainly focused on the Computational Fluid Dynamics. Analysis for various fin configurations & the analysis of heat transfer coefficient for the notched fin array. Key Word: Computational Fluid Dynamics (CFD), Notched Fin Array, Heat Transfer rate, Heat Transfer Coefficient.