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SUMMARY:Modelling large-scale influences in near-wall turbulence - Marusic
 \, I (Melbourne)
DTSTART:20080908T161000Z
DTEND:20080908T163000Z
UID:TALK13347@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Turbulent boundary layers are traditionally considered in term
 s of an inner and outer region\, not excluding the logarithmic region\, wh
 ich is usually identified with an overlap of the two regions. Recent exper
 iments in high Reynolds number flows have revealed that the key to underst
 anding the scaling behaviour of the turbulence statistics lies in unravell
 ing the influence and interaction of the outer and inner regions. In this 
 talk a model for the influence of the large-scale motions in wall turbulen
 ce (termed superstructures) on the inner viscous region is presented. The 
 model has implications for predicting wall-shear stress fluctuations based
  on a filtered velocity signature in the outer part of the boundary layer\
 , as required in high Reynolds number large-eddy simulations. 
LOCATION:Seminar Room 1\, Newton Institute
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