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SUMMARY:Turbulent-laminar patterns - Laurette Tuckerman\, ESPCI Paris
DTSTART:20240202T160000Z
DTEND:20240202T170000Z
UID:TALK210412@talks.cam.ac.uk
CONTACT:Professor Grae Worster
DESCRIPTION:Experiments and numerical simulations have shown that turbulen
 ce in\ntransitional wall-bounded shear flows such as plane Couette and Poi
 seuille flow\nfrequently takes the form of long oblique bands\, if the dom
 ains are sufficiently\nlarge to accommodate them. At their upper Reynolds-
 number threshold\,\nlaminar regions carve out gaps in otherwise uniform tu
 rbulence\, thereby forming\nregular oblique turbulent-laminar patterns wit
 h a large spatial wavelength.\nAt the lower threshold\, isolated turbulent
  bands sparsely populate otherwise\nlaminar domains and complete laminariz
 ation takes place via their disappearance\ncharacterized by the 2D directe
 d percolation scenario.\n
LOCATION:MR2
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