The Quest for Speed: Simulating the Pedaling Cyclist with Dynamic CFD
Aerodynamics is one of the most critical factors in time trial performance. To optimize it, the Groupama-FDJ cycling team relies on a combination of three methods: wind tunnel testing, on-road testing, and numerical simulation (CFD). However, previous CFD studies have primarily relied on static cyclist models, which fail to capture the full scope of dynamic aerodynamic effects.
This study tackles this limitation by implementing a pedaling cyclist in our CFD simulations using the overset mesh method in Ansys Fluent. By introducing this dynamic motion, we can accurately simulate the complex airflow around a moving athlete. The results demonstrate a strong correlation with surface data collected from wind tunnel tests, particularly regarding drag coefficients, and enable a deep analysis of the cyclist's transient wake. Ultimately, this successful pilot study validates the overset method for our applications and establishes a robust foundation for exploring more advanced aerodynamic research in the future.
