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SUMMARY:New direction in elastic instability and turbulence in straight ch
 annel viscoelastic flow - Victor Steinberg (Weizmann Institute of Science\
 , Hebrew University of Jerusalem)
DTSTART:20220331T133000Z
DTEND:20220331T140000Z
UID:TALK171215@talks.cam.ac.uk
DESCRIPTION:After a short introduction into polymer solution hydrodynamics
 \, I shortly describe the main results on elastically driven instabilities
  and elastic turbulence in flow geometries with curvilinear streamlines\, 
 about the prediction of elastic waves and absence of such waves in these f
 lows. Then I switch to the main subject of the talk\, namely recent develo
 pment in parallel shear flows of polymer solutions proved to be linearly s
 table for the last about 50 years. We discovered in a straight channel flo
 w elastically driven instability\, elastic turbulence\, elastic waves\, dr
 ag reduction\, and re-laminarization. In this regard\, I discuss shortly n
 ormal versus non-normal bifurcations in such flows.
LOCATION:Seminar Room 1\, Newton Institute
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