Solar power is a renewable energy source and has the potential to be use as a source of electricity around the globe. Various types of solar power plants include parabolic troughs, parabolic dishes, and solar towers. Solar power is generally used in solar collector, solar water heater, solar chimney, and photovoltaic cell. In most of the applications of solar power, heat exchangers are used and for effective exchange of the heat, fins are used. In this chapter, analytical investigation is made for three-dimensional fluid flow and convective heat transfer for designed fin. The aim is to achieve the highest rate of convective heat transfer by changing the relative attack angle of fin. For analytical investigation, simulation software is used to save time and cost of the project by running multiple simulations on different attack angle of the fin. The results are compared with other simulation running with different velocity magnitude. The designed fin with perfect relative attack angle can be used in future industry that needs heat transfer application as it is more reliable and cost-effective. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.