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SUMMARY:ENAC Seminar Series by Dr Diego F. Muriel
DTSTART:20230314T153000
DTEND:20230314T163000
DTSTAMP:20260916T032137Z
UID:ab6d058f4dc53ad66348c307c84974e3972c3f51248e3c4d01caad28
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Diego F. Muriel\n15:30 – 16:30 – Dr Diego F. Muriel\nRe
 search Scientist\, Johns Hopkins University\, US\n\nPromotion of instabili
 ties in flexible materials for hydro-kinetic energy harvesting application
 s\n\nPlates and membranes interacting with incoming fluids are canonical p
 roblems exhibiting rich physics concerning the onset of flutter instabilit
 ies. Such instabilities\, once considered a failure state\, are now exploi
 ted for new functionalities such as drag control or energy harvesting. Thi
 s presentation will explore the dynamics of the fluid-structure interactio
 n problem of a thin elastic plate buckled into a second mode-like deformat
 ion created by an external net compressive force. The deformed plate is im
 mersed in an incompressible flow and is studied without large structural m
 otions\, and subsequently\, at flow speeds where large oscillations occur.
  The deformation in the plate is intended to promote its oscillatory behav
 ior at low flow velocities (i.e.\, early onset of flutter)\, increasing t
 he operational range and the potential for energy harvesting of such devi
 ces.\n\nResults of numerical\, analytical\, and experimental approaches wi
 ll provide evidence of the main physical mechanisms contributing to the ea
 rly 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 oscill
 ations. 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 d
 evices 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 dy
 namic stall.\n\n\nShort bio:\nDiego Muriel holds an undergraduate degree i
 n Civil Engineering from Javeriana University\, Colombia\, where he receiv
 ed a National Prize in Environmental Engineering for his work on optimizat
 ion of hydraulic infrastructure for potable water. Dr. Muriel completed an
  MS\, sponsored by Fulbright\, and a Ph.D.\, both in Civil and Environment
 al Engineering at Cornell University.\nHe is currently a Research Scientis
 t at Johns Hopkins University\, where he previously held postdoctoral and 
 visiting scientist positions. His research focuses on experimental fluid d
 ynamics applied to turbulent multiphase flows\, hydrokinetic energy harves
 ting\, fluid-structure interactions\, and the development of flow diagnost
 ics imaging.
LOCATION:GC B1 10 https://plan.epfl.ch/?room==GC%20B1%2010
STATUS:CONFIRMED
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