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SUMMARY:MechE Colloquium: The role of added mass and circulatory forces in
  unsteady incompressible flows
DTSTART:20191029T121500
DTEND:20191029T131500
DTSTAMP:20260916T032118Z
UID:e8c4da4d9441a583af40204e46d0fbf1c8786dc99a38110ddb7ad660
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Holger Babinsky\, Engineering Department\, University of
  Cambridge\nAbstract:\nUnsteady effects occur in many natural and technica
 l flows\, for example flapping wings or air vehicle gust encounters. If th
 e accelerations are large the resulting unsteady forces can be quite consi
 derable\, a fact that is exploited by insects and small birds to generate 
 additional lift at low Reynolds numbers. However\, the exact physical mech
 anisms underlying the generation of unsteady force continue to challenge o
 ur understanding of such flows. One approach to improve our insight is to 
 identify the dominant effects and describe these with low-order force mode
 ls. An often-made classification is to group forces into circulatory (e.g.
  vortex lift or bound circulation) and non-circulatory (added-mass).\n \n
 Although the concept of added mass has been around for more than a century
  and is superficially simple\, its details continue to confound and confus
 e. In this talk I will re-visit the definition of added mass and propose a
  different interpretation. Using a series of simple\, canonical\, experime
 nts and PIV I will show how the contributions made by different physical f
 orce mechanisms can be identified experimentally and thus clarify some ope
 n questions about this concept.\n \nBio:\nHolger Babinsky originates from
  Bavaria and studied Aerospace Engineering at Stuttgart University in Germ
 any. He obtained a PhD in hypersonic aerodynamics from Cranfield Universit
 y (UK) in 1994. After 18 months as Research Associate at the Shock Wave Re
 search Centre of Tohoku University in Sendai\, Japan he returned to the UK
  to take up a position at the University of Cambridge. He is now Professor
  of Aerodynamics in the Engineering Department and Head of Energy\, Fluid 
 Mechanics and Turbomachinery as well as a Fellow of Magdalene College.\n 
 \nHis main areas of research are in the field of experimental aerodynamics
  and associated measurement techniques. Apart from shock-wave/boundary-lay
 er interactions\, which he has studied for almost 30 years\, his current r
 esearch includes the aerodynamics of micro-air vehicles\, road vehicles an
 d flow control for transonic aircraft wings and supersonic engine inlets. 
 He is the Editor-in-Chief of the Royal Aeronautical Society’s Aeronautic
 al Journal (the worlds oldest aeronautical journal in production) and a Fe
 llow of the Royal Aeronautical Society\, an Associate Fellow of the Americ
 an Institute of Aeronautics and Astronautics\, and an Associate Editor of 
 Experiments in Fluids.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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