This report details a Computational Fluid Dynamics (CFD) simulation of heat transfer through pin-fins using ANSYS software. The study investigates four different pin-fin configurations, modeling their geometries in SolidWorks and importing them into ANSYS Workbench for CFD analysis. The methodology includes meshing the models, defining boundary conditions (air velocity of 2 m/s and inlet temperature of 20°C), and solving the governing equations, including the Navier-Stokes and energy equations. The results section presents temperature contours, velocity vectors, and streamlines for each configuration. A discussion section analyzes the thermal performance of each configuration, comparing maximum temperatures and identifying the most effective design for heat dissipation. The report concludes with an assessment of the impact of different configurations on heat transfer efficiency, offering insights into optimizing pin-fin designs for thermal management applications. The report follows the guidelines of the assignment brief, including an introduction, methodology, results, and discussion section with a word count between 1500 and 2000 words.