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SUMMARY:Transition to turbulence in bent pipes
DTSTART:20180308T140000
DTEND:20180308T150000
DTSTAMP:20260922T042810Z
UID:f6eec5064f01b0f10cde226fe571647c9eea7cb6fbbfc9cb816bb243
CATEGORIES:Conferences - Seminars
DESCRIPTION:Jacopo Canton\nBio:\nJacopo Canton is a PhD candidate at the L
 inné FLOW Centre\, KTH Mechanics in Stockholm.\n\nHis research focuses on
  the dynamics of transition to turbulence in low Reynolds number flows\, b
 ut he has also worked on methods for drag reduction in fully turbulent flo
 ws.\n\nCanton has published in leading journals of his field\, such as JFM
  and PRF\, and presented his results at over 15 international conferences\
 ; in 2017 he was awarded the GKN Aero\nThe flow through curved pipes has r
 eceived increasing attention in the past decades\, but several phenomena s
 till miss an exhaustive explanation. Bent pipes are fundamental components
  in various industrial devices\, and are also studied in the medical field
 \, being an integral part of vascular and respiratory systems [2\,3].\nThe
  transition to turbulence of these flows has received a considerable amoun
 t of interest in the past decades: the recent works by Canton et al. [4] a
 nd Kühnen et al. [5] determined that the flow is linearly unstable\, and
  undergoes a Hopf bifurcation for any curvature greater than zero. This be
 haviour is in contrast to the flow in a straight pipe which is linearly st
 able and undergoes subcritical transition [1].\nLow pipe curvatures presen
 t a different scenario: here the flow becomes turbulent before onset of th
 e linear instability\, and no clear transition boundary has been observed.
  For low curvatures a bent pipe appears to behave similarly to a straight 
 pipe\, i.e. the flow undergoes transition to turbulence despite being line
 arly stable to infinitesimal perturbations [5\,6].\n\n[1] D. Barkley. Theo
 retical perspective on the route to turbulence in a pipe. J. Fluid Mech.\,
  803:P1\, 2016.\n[2] S. A. Berger\, L. Talbot\, and L.-S. Yao. Flow in cur
 ved pipes. Annu. Rev. Fluid Mech.\, 15:461–512\, 1983.\n[3] K. V. Bulusu
 \, S. Hussain\, and M. W. Plesniak. Determination of secondary flow morpho
 logies by wavelet analysis in a curved artery model with physiological inf
 low. Exp. Fluids\, 55:1832\, 2014.\n[4] J. Canton\, P. Schlatter\, and R. 
 Örlü. Modal instability of the flow in a toroidal pipe. J. Fluid Mech.
 \, 792:894–909\, 2016.\n[5] J. Kühnen\, P. Braunshier\, M. Schwegel\, 
 H. C. Kuhlmann\, and B. Hof. Subcritical versus supercritical transition t
 o turbulence in curved pipes. J.  Fluid Mech.\, 770:R3\, 2015.\n[6] K. R.
  Sreenivasan and P. J. Strykowski. Stabilization effects in flow through h
 elically coiled pipes. Exp. Fluids\, 1:31–36\, 1983.\n\n 
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
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