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SUMMARY:Subcritical equilibria in counter-rotating Taylor-Couette flow - M
 eseguer\, A (Universitat Politcnica de Catalunya)
DTSTART:20080912T084000Z
DTEND:20080912T090000Z
UID:TALK13386@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We provide a numerical exploration of the spiral regimes that 
 appear in small-gap Taylor-Couette flow of radius ratio 0.883 and for high
  counter-rotating Reynolds numbers. In particular\, the exporation is carr
 ied out for a fixed outer rotation Reynolds number value of R_o=-1200. The
  spiral regimes found beyond the linear stability critical values are trac
 ked back as a function of the inner rotation Reynolds number R_i with an a
 rch-length continuation scheme via Newton-Krylov algorithms suitably tailo
 red for axially-moving and/or azimuthally rotating reference frames. The s
 pirals found have been found to be subcritical. This study is the first st
 ep taken in order to provide the essential inner structure of the skeleton
  of equilibria that may be responsible for the subcritical transition and 
 hysteretic phenomena that has been reported by many experimentalists in th
 e past. 
LOCATION:Seminar Room 1\, Newton Institute
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