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SUMMARY:Lessons from the discovery of different regimes in elasto-inertial
  turbulence - Yves Dubief (University of Vermont)
DTSTART:20220331T130000Z
DTEND:20220331T133000Z
UID:TALK171212@talks.cam.ac.uk
DESCRIPTION:In flows with polymer additives\, elasto-inertial turbulence d
 escribes a global or local state of flow where polymer dynamics is competi
 ng with or overwhelming&nbsp\;the dynamics of the flow without polymers. I
 t is still too early to conclude if EIT is the manifestation of fundamenta
 l elastic instabilities\, possibly connected with elastic turbulence (ET) 
 in inertialess flows\, or its own turbulence distinct to ET. Similarly\, m
 uch work is needed to understand the role of EIT with respect to maximum d
 rag reduction (MDR)\, the asymptotic state of drag reduction in supercriti
 cal wall-bounded flows. In the quest to resolve these gaps in our understa
 nding of polymer flows\, distinct regimes have been identified\, including
  a first coherent structure in 2D\, periodic\, simulated channel flows. Th
 is talk discusses the insights gained by these regimes and their possible 
 connections to phenomena observed in 3D flows with polymer additives.
LOCATION:Seminar Room 1\, Newton Institute
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