Weiyue Yan ¹ and Moddwyn Andaya ² , ¹ Pacific Academy Irvine, USA, ² California State University, USA

This project develops a Unity-based simulation platform that helps students and beginner designers analyze vehicle aerodynamics without expensive wind tunnel testing [6]. Air resistance plays an important role in vehicle performance, but traditional aerodynamic testing methods require costly equipment and complex professional software. To address this problem, the project introduces an interactive simulation environment where users can upload 3D car models, select or upload maps, and simulate airflow conditions [7].The system is built around three main components: Properties, CFD simulation, and Map. These components work together to control inputs, generate aerodynamic visualization, and manage user interaction. The CFD system uses a simplified real-time approach based on dynamic pressure and precomputed surface responses to provide stable and interactive feedback.During development, challenges such as path design, model scaling, and collision detection were addressed through physics adjustments and automated systems. Experimental evaluation compared the system against ANSYS Fluent, showing an average error of 5.5%, indicating that the platform provides reasonably accurate results while maintaining high performance and accessibility.

CFD Simulation, Spline, 3D modeling, Unity