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SUMMARY:Reduction of turbulent wall-friction by rotating discs - Dr. Pierr
 e Ricco\, University of Sheffield
DTSTART:20170127T130000Z
DTEND:20170127T140000Z
UID:TALK70379@talks.cam.ac.uk
CONTACT:Akshath Sharma
DESCRIPTION: The effects of  flush-mounted rotating discs beneath turbulen
 t channel\nflows are studied numerically. The focus is on the substantial 
 turbulent drag reduction\nachieved for specified disc diameter and tip vel
 ocity. The energy budget is investigated\,\ntaking into the power spent by
  the discs\, and thereby computing the net power saved.\nA particular diff
 erent disc arrangement leads to the striking result that the drag reductio
 n\nincreases if the number of discs is halved. We will further discuss fre
 ely rotating discs\nfor which the disc motors are switched off and the wal
 l turbulence determines their dynamics.
LOCATION:JDB Seminar Room\, CUED
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