CFD Simulation of Flow around Ahmed Body Using Drag Reducing Devices

This project investigates the aerodynamic performance of the Ahmed body with 35⁰, a well-known geometric modelfor studying vehicle aerodynamics, particularly at varying slant angles. This study focuses on the effects of variousaerodynamic add-ons, including vortex generators, custom-generated striped vortex generators on the rear end, side vanes andbase flaps on the drag and lift characteristics of the Ahmed body. Computational fluid dynamics (CFD) simulations areemployed to analyze the airflow around the model under different configurations. Designed in Catia V5, the geometry ismodeled and meshed in Ansys Workbench and Simulation is performed in Fluent. The mesh parameters are taken from[6],;initially, the results of the Ahmed Body were obtained for Cd-0.285 which are quite close to those value mentioned0.289.Later grid independence was performed for better accuracy, and later add-ons were added and tested. The resultsindicated an overall drag reduction of approximately 12% from that of the Ahmed Body without any add-ons. This resulted inthe power consumption of 175 W of energy.