ENAC Seminar Series by Dr Diego F. Muriel
Event details
| Date | 14.03.2023 |
| Hour | 15:30 › 16:30 |
| Speaker | Dr Diego F. Muriel |
| Location | |
| Category | Conferences - Seminars |
| Event Language | English |
15:30 – 16:30 – Dr Diego F. Muriel
Research Scientist, Johns Hopkins University, US
Promotion of instabilities in flexible materials for hydro-kinetic energy harvesting applications
Plates and membranes interacting with incoming fluids are canonical problems exhibiting rich physics concerning the onset of flutter instabilities. Such instabilities, once considered a failure state, are now exploited for new functionalities such as drag control or energy harvesting. This presentation will explore the dynamics of the fluid-structure interaction problem of a thin elastic plate buckled into a second mode-like deformation created by an external net compressive force. The deformed plate is immersed in an incompressible flow and is studied without large structural motions, and subsequently, at flow speeds where large oscillations occur. The deformation in the plate is intended to promote its oscillatory behavior at low flow velocities (i.e., early onset of flutter), increasing the operational range and the potential for energy harvesting of such devices.
Results of numerical, analytical, and experimental approaches will provide evidence of the main physical mechanisms contributing to the early onset of flutter: the destabilizing action of the compressive force, a deformed locally stable plate, and an unsteady flow field resulting in non-zero pressure drag and lift, all existent before structural oscillations. As it occurs with flapping filaments or flags, the resemblance of the plate’s induced oscillatory movements with animal locomotion poses the intriguing possibility of using highly deformed plates as propulsion devices or as models to study locomotion itself. Furthermore, findings of the fully coupled fluid-structure interaction problem can be extrapolated to study the on-set of flow separation, flow over cambered wings, and dynamic stall.
Short bio:
Diego Muriel holds an undergraduate degree in Civil Engineering from Javeriana University, Colombia, where he received a National Prize in Environmental Engineering for his work on optimization of hydraulic infrastructure for potable water. Dr. Muriel completed an MS, sponsored by Fulbright, and a Ph.D., both in Civil and Environmental Engineering at Cornell University.
He is currently a Research Scientist at Johns Hopkins University, where he previously held postdoctoral and visiting scientist positions. His research focuses on experimental fluid dynamics applied to turbulent multiphase flows, hydrokinetic energy harvesting, fluid-structure interactions, and the development of flow diagnostics imaging.
Research Scientist, Johns Hopkins University, US
Promotion of instabilities in flexible materials for hydro-kinetic energy harvesting applications
Plates and membranes interacting with incoming fluids are canonical problems exhibiting rich physics concerning the onset of flutter instabilities. Such instabilities, once considered a failure state, are now exploited for new functionalities such as drag control or energy harvesting. This presentation will explore the dynamics of the fluid-structure interaction problem of a thin elastic plate buckled into a second mode-like deformation created by an external net compressive force. The deformed plate is immersed in an incompressible flow and is studied without large structural motions, and subsequently, at flow speeds where large oscillations occur. The deformation in the plate is intended to promote its oscillatory behavior at low flow velocities (i.e., early onset of flutter), increasing the operational range and the potential for energy harvesting of such devices.
Results of numerical, analytical, and experimental approaches will provide evidence of the main physical mechanisms contributing to the early onset of flutter: the destabilizing action of the compressive force, a deformed locally stable plate, and an unsteady flow field resulting in non-zero pressure drag and lift, all existent before structural oscillations. As it occurs with flapping filaments or flags, the resemblance of the plate’s induced oscillatory movements with animal locomotion poses the intriguing possibility of using highly deformed plates as propulsion devices or as models to study locomotion itself. Furthermore, findings of the fully coupled fluid-structure interaction problem can be extrapolated to study the on-set of flow separation, flow over cambered wings, and dynamic stall.
Short bio:
Diego Muriel holds an undergraduate degree in Civil Engineering from Javeriana University, Colombia, where he received a National Prize in Environmental Engineering for his work on optimization of hydraulic infrastructure for potable water. Dr. Muriel completed an MS, sponsored by Fulbright, and a Ph.D., both in Civil and Environmental Engineering at Cornell University.
He is currently a Research Scientist at Johns Hopkins University, where he previously held postdoctoral and visiting scientist positions. His research focuses on experimental fluid dynamics applied to turbulent multiphase flows, hydrokinetic energy harvesting, fluid-structure interactions, and the development of flow diagnostics imaging.
Practical information
- General public
- Invitation required
- This event is internal
Organizer
- ENAC
Contact
- Cristina Perez