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SUMMARY:Spontaneous Symmetry Breaking of a Hinged Flapping Filament Genera
 tes Lift
DTSTART:20121127T141500
DTEND:20121127T151500
DTSTAMP:20260924T120905Z
UID:81504b6d4e8ed8fda3343851471d8bd11224db62b6c7397b51c55909
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Alessandro Bottaro : http://www.dicat.unige.it/bottaro/i
 ndex.html\nThe behavior of a flexible filament anchored to the rear end of
  a fixed rigid bluff body is investigated numerically for intermediate Rey
 nolds numbers. For sufficiently short and rigid filaments\, asymmetric per
 iodic flapping motion emerges from the intrinsically symmetric dynamics\, 
 resulting in net lift force and reduction of mean drag force. We observe t
 hat this phenomenon is accompanied to a buckling instability in the recirc
 ulation region of the von Karman wake. To sustain compression the short fi
 lament creates a vortical structure on one of its sides\, which then break
 s symmetry and counter-acts the von Karman vortices in the recirculation z
 one.\nConceptually\, this investigation demonstrates that spontaneous symm
 etry-breaking of a single filament can alter bluff body wakes favorably. T
 he work has been carried out together with Shervin Bagheri (KTH\, Stockhol
 m) and Andrea Mazzino (University of Genova).
LOCATION:ME B3 31 http://plan.epfl.ch/?room=MEB331
STATUS:CONFIRMED
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