A Novel Approach Combining Rigging Animation Technique and CFD to Assess Aerodynamic Performances of Professional Cyclists

Reduction of aerodynamic drag is a crucial aspect of cycling. Currently, to optimize aerodynamics, athletes rely on wind tunnel tests or CFD simulations. Despite the undeniable advantage of the latter in terms of cost and time effort, they still require validation through wind tunnel measurements. This paper introduces a novel workflow that aims to streamline and accelerate the aerodynamic analysis process for cycling. The proposed workflow focuses on utilizing a full-sized mannequin and integrates CFD simulations, wind tunnel validation, 3D scanning, and rigging animation techniques. The animation technique involves the creation of a virtual skeleton that allows the scanned model to be posed in any desired position, eliminating the need for physical adjustments and repetitive wind tunnel testing. To showcase the time-saving advantages of this approach, a steady CFD analysis is conducted to compare six different configurations obtained using the rigged model, in terms of drag areas, velocity streamlines, and pressure coefficient distribution. The obtained data trends closely align with previous similar studies in the literature and the results from the simulation have been compared with wind tunnel test measurements. Additionally, future adjustments to the position or equipment can be easily made using the virtual rigging model. By integrating virtual techniques with CFD simulations and wind tunnel validation, the proposed workflow enables rapid evaluation of aerodynamic performance in a more efficient and cost-effective manner.