MechE Colloquium: Unraveling Fluid–Structure Interactions in Crossflow Pendular Systems
Event details
| Date | 14.10.2025 |
| Hour | 12:00 › 13:00 |
| Speaker | Dr. Mickaël Bourgoin, CNRS, ENS, University of Lyon |
| Location | Online |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract: Fluid–structure interactions in pendular systems are prevalent in both natural and engineered settings, giving rise to complex dynamics and a variety of instabilities. In this talk, we explore the flow–structure interactions of simple pendulum systems with one degree of freedom in the crossflow direction. We begin by investigating a disk pendulum, demonstrating how variations in the disk’s yaw angle induce intricate bi-stable dynamics, which are effectively captured using a simple stochastic modelling approach. Next, we examine a pendulum with a “T-shaped” geometry, where the unique configuration triggers a galloping instability, leading to large-amplitude oscillations. We analyze these flow–structure interactions and demonstrate that the system’s behavior can be accurately modeled as a van der Pol oscillator. Finally, we showcase the integration of additive manufacturing with miniature pressure sensors, enabling direct aerodynamic force measurements on slender “T-shaped” geometries as thin as 3 mm. These technique facilitate the development of cost-effective multi-hole pressure probes, broadening the potential for future experimental investigations.
Co-workers : Di Bao & Nicolas Plihon
Biography: Mickaël Bourgoin is CNRS Research Director at the Physics Laboratory of ENS de Lyon, France, specializing in the transport of fields and particles in complex, particularly turbulent, flows. His research employs innovative Lagrangian modeling and experimental techniques to investigate single and multiphase turbulence, mixing, particle dispersion, and fluid–structure interactions, addressing challenges at the intersection of fundamental fluid mechanics and applications in industry, the environment, and health.
Dr. Bourgoin lectures advanced fluid dynamics at Ecole Normale Supérieure de Lyon and Ecole Centrale de Lille, and oversees the Master 2 program in Physics at ENS de Lyon. He founded the international winter school New Challenges in Turbulence Research (NCTR) in 2008, organized biennially in Les Houches, and chaired the 14th European Turbulence Conference in Lyon (2013). He currently serves on the board of the European Fluid Dynamics Conference Committee and leads the French National Research Network Navier-Stokes 2.00. Dr. Bourgoin has published over 100 articles in international journals and delivered more than 50 invited lectures, including keynotes at the 13th European Turbulence Conference (Warsaw, 2011), the 9th International Conference on Multiphase Flow (Florence, 2016) and the 72nd APS Division of Fluid Dynamics Meeting (Seattle). His contributions have been recognized with the 2009 Euromech Prize for Young Scientists and the 2022 ONERA Prize of the French Academy of Sciences.
Co-workers : Di Bao & Nicolas Plihon
Biography: Mickaël Bourgoin is CNRS Research Director at the Physics Laboratory of ENS de Lyon, France, specializing in the transport of fields and particles in complex, particularly turbulent, flows. His research employs innovative Lagrangian modeling and experimental techniques to investigate single and multiphase turbulence, mixing, particle dispersion, and fluid–structure interactions, addressing challenges at the intersection of fundamental fluid mechanics and applications in industry, the environment, and health.
Dr. Bourgoin lectures advanced fluid dynamics at Ecole Normale Supérieure de Lyon and Ecole Centrale de Lille, and oversees the Master 2 program in Physics at ENS de Lyon. He founded the international winter school New Challenges in Turbulence Research (NCTR) in 2008, organized biennially in Les Houches, and chaired the 14th European Turbulence Conference in Lyon (2013). He currently serves on the board of the European Fluid Dynamics Conference Committee and leads the French National Research Network Navier-Stokes 2.00. Dr. Bourgoin has published over 100 articles in international journals and delivered more than 50 invited lectures, including keynotes at the 13th European Turbulence Conference (Warsaw, 2011), the 9th International Conference on Multiphase Flow (Florence, 2016) and the 72nd APS Division of Fluid Dynamics Meeting (Seattle). His contributions have been recognized with the 2009 Euromech Prize for Young Scientists and the 2022 ONERA Prize of the French Academy of Sciences.
Practical information
- General public
- Free