Jeudi 23 janvier à 11h00, salles des séminaires IRPHE
Flow-structure interactions play a crucial role in engineering, enabling both energy harvesting and passive flow control. Cylindrical structures can exhibit vortex-induced vibrations (VIV), where periodic vortex shedding drives oscillations. While VIV can threaten structural stability, it also offers potential for energy extraction. To explore this, we developed an oscillating cylinder system with tunable mechanical properties to study energy harvesting efficiency. In contrast, kirigami-based structures leverage smart shape-shifting to passively adapt to the flow. Inspired by paper cutting, these sheets deform into steady-state shapes dictated by their cutting patterns, functioning as poro-elastic membranes. Their fluid-structure coupling enables flow control by modifying wake dynamics.
These two examples of fluid-structure interactions provide insights into harnessing flow-induced motions for engineering applications.