Oscillating in Turbulence
Event details
| Date | 27.04.2026 |
| Hour | 11:00 › 12:00 |
| Speaker | Prof. Stéphane Perrard |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract :
Inspired by the artist Ned Kahn’s, who has built kinetic façades of buildings to reveal the hidden nature of the wind, we study with J. Zhang the oscillation of light structures in wind. We study in particular the oscillation of a collection of pendulum, moving in the direction perpendicular to the wind. Starting from observations of the kinetic façades, we have build laboratory scales experiments, and intermediate scale version in wind tunnel using smartphones as both oscillating structure and instrument. We then move to the oscillation of a single pendulum, and study its response to the wind, revealing that linear perturbation theory can apply, and some features of the wind can hence be revealed.
Bio :
Stéphane Perrard obtained PhD from University Paris-Cité in 2014, supervised by Yves Couder and Emmanuel Fort on wave-particle interaction dynamics. Postdoctoral Scholar at the University of Chicago, Princeton U., U. Paris-Saclay, Ecole Polytechnique and Junior Research Chair at Ecole Normale Supérieure Paris from 2018 to 2021, he is a CNRS researcher at ESPCI since 2022, in PMMH Laboratory.
With a main background in experimental fluid mechanics, in particular on free surface flows, surface waves, and large Reynolds number dynamics, he developed laboratory experiments and numerical simulations inspired by geophysical situations, such as ocean-atmosphere interactions (bubble fragmentation in turbulence) and ocean waves-sea ice interactions.
Over the last few years, Stéphane Perrard has started to study sea ice dynamics, crossing scale from laboratory experiments to field experiments in the Saint Lawrence Estuary. Inspired by field observation, he developed research activities around oscillating dynamics of large objects in turbulence, combining laboratory and field measurements.
Inspired by the artist Ned Kahn’s, who has built kinetic façades of buildings to reveal the hidden nature of the wind, we study with J. Zhang the oscillation of light structures in wind. We study in particular the oscillation of a collection of pendulum, moving in the direction perpendicular to the wind. Starting from observations of the kinetic façades, we have build laboratory scales experiments, and intermediate scale version in wind tunnel using smartphones as both oscillating structure and instrument. We then move to the oscillation of a single pendulum, and study its response to the wind, revealing that linear perturbation theory can apply, and some features of the wind can hence be revealed.
Bio :
Stéphane Perrard obtained PhD from University Paris-Cité in 2014, supervised by Yves Couder and Emmanuel Fort on wave-particle interaction dynamics. Postdoctoral Scholar at the University of Chicago, Princeton U., U. Paris-Saclay, Ecole Polytechnique and Junior Research Chair at Ecole Normale Supérieure Paris from 2018 to 2021, he is a CNRS researcher at ESPCI since 2022, in PMMH Laboratory.
With a main background in experimental fluid mechanics, in particular on free surface flows, surface waves, and large Reynolds number dynamics, he developed laboratory experiments and numerical simulations inspired by geophysical situations, such as ocean-atmosphere interactions (bubble fragmentation in turbulence) and ocean waves-sea ice interactions.
Over the last few years, Stéphane Perrard has started to study sea ice dynamics, crossing scale from laboratory experiments to field experiments in the Saint Lawrence Estuary. Inspired by field observation, he developed research activities around oscillating dynamics of large objects in turbulence, combining laboratory and field measurements.
Practical information
- General public
- Free