CFD Simulations Report: 2D Cylinder, Ahmed Model, Optimization

This report presents a Computational Fluid Dynamics (CFD) analysis of fluid flow, focusing on a 2D cylinder and the Ahmed model. The study investigates the flow of air around a 2D cylinder at various velocities and Reynolds numbers, validating results against existing literature. The report details the methodology, including geometry creation, meshing techniques, and boundary condition assignments within the STAR-CCM+ software. The Ahmed model, a benchmark for vehicle aerodynamics, is then introduced, with a focus on model creation, modification, and optimization. The results section presents velocity and pressure distributions for both the original and optimized Ahmed models, along with analyses of turbulent kinetic energy and vorticity. The report concludes with findings, recommendations, and a comprehensive list of references, providing a detailed overview of the CFD simulation process and the aerodynamic characteristics of the models.