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SUMMARY:MechE Colloquium: Unsteady deformations of elastic structures driv
 en by vortex shedding
DTSTART:20220524T120000
DTEND:20220524T130000
DTSTAMP:20260506T220247Z
UID:4d086e1a6dfaa97835b41c4357f6a454ca9ca76f9343a700ce753d3c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Kenny Breuer\, Breuer Lab\, School of Engineering\, Brow
 n University\nFace masks are recommended for in-person attendance in MED 0
  1418.\n\nAbstract: Elastic bodies\, when immersed in a flow\, can experie
 nce violent flow-induced-oscillations due to unsteady forces generated by 
 vortex shedding.  These tightly-coupled fluid-structure interactions (FSI
 ) lead to large-scale elastic deformation of the structure\, which\, in tu
 rn\, changes the nature of the vortex shedding\, as well as the lift and d
 rag forces experienced by the body.  In this talk I will present two tale
 s of FSI.  The first describes the deformation of a soft membrane disk in
  a flow.  The membrane deforms\, much like a soap bubble and vibrates due
  to the unsteady vortex shedding.  Using a combination of experiments and
  theory we describe the membrane deformation and the changes in the steady
  and unsteady drag forces experienced by the disk. The second tale addres
 ses the use of a soft membrane airfoil heaving and pitching in a freestrea
 m in order to harvest the flow energy.  The elastic deformation of the me
 mbrane wing generates an adaptive camber which enhances the lift generati
 on and leads to a greatly enhanced power coefficient.  Again\, we will us
 e a mixture of experiments with some theoretical modeling to understand th
 e behavior of this FSI system.\n\nBiography: Kenny Breuer received his Sc.
 B. from Brown University in Mechanical Engineering (1982) and his Ph.D. fr
 om MIT in Aeronautics and Astronautics (1988). He spent two years back at 
 Brown as a Post Doctoral Fellow in Applied Mathematics and nine years on t
 he faculty at MIT\, before finally returning to Brown in 1999\, where he i
 s currently Professor of Engineering. In 2010 he received a courtesy appoi
 ntment as Professor of Ecology and Evolutionary Biology. From 2011 to 2014
  he served as Senior Associate Dean of Engineering for Academic Programs. 
 Professor Breuer’s research interests are in the broad field of Fluid Dy
 namics and cover a wide range of diverse topics. At the micron-scale\, he 
 has been active in the development of diagnostic techniques for micron-sca
 le and near-surface velocimetry\, in the characterization of slip flows\, 
 the mechanics of bacterial motility and flagellar and cilliar mechanics an
 d the nanoscale flow near a moving contact line. At the macro-scale\, he h
 as worked on the mechanics of animal flight (particularly bat flight)\, v
 ortex interactions with compliant structures and\, most recently\, energy
  harvesting from fluid flows. With his students and collaborators\, he ha
 s co-authored over one hundred peer-reviewed articles in scientific journ
 als\, numerous book chapters\, and has edited several books\, including M
 icroscale Diagnostic Techniques (Springer\, 2004). Professor Breuer has a
 lso been active in fluid dynamics education and outreach\, He is a co-auth
 or on the best-selling DVD: Multimedia Fluid Mechanics (Camb. Univ. Press
 )\, and co-editor of the compilation: A Gallery of Fluid Motion (Camb. U
 niv. Press). He has also appeared on programs such as PBS’s NOVA\, NPR
 ’s Science Friday\, the Discovery Channel’s series Weird Connections\
 , and the BBC’s series Invisible Worlds. His research has been featur
 es in popular press such as the New York Times\, Discover magazine and has
  been highlighted on the website of the National Science Foundation. Profe
 ssor Breuer has received a number of honors and awards including Fellow of
  the American Society of Mechanical Engineers (2013)\, Fellow of the Ameri
 can Physical Society (2010)\, Associate Fellow if the American Insitute of
  Aeronautics and Astronautics (2013)\, Chair of the APS-Division of Fluid 
 Dynamics (2012)\, National Merit Scholar (1978)\, ONR Graduate Fellowship 
 (1982-7). He was selected as the Midwest Mechanics lecturer in 200&. And w
 as the Paris Sciences Professor at ESPCI in 2015.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/67275071152
STATUS:CONFIRMED
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