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SUMMARY:Bifurcation phenomena in the flow through a sudden expansion in a 
 circular pipe - Seddon\, J (Manchester)
DTSTART:20080912T111000Z
DTEND:20080912T113000Z
UID:TALK13387@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We report the results of an experimental investigation of lami
 nar and time-dependent flows through a sudden expansion in a circular pipe
 . The flow state was investigated using high resolution MRI imaging techni
 ques which have allowed us to settle a long standing debate on the first i
 nstability that occurs. As Re is increased\, the flow passes through a ste
 ady symmetry breaking bifurcation such that the position of the recirculat
 ing eddy becomes asymmetric within the pipe. This in turn gives way to sim
 ple periodic motion via a Hopf bifurcation with further increase in Re.
LOCATION:Seminar Room 1\, Newton Institute
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