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SUMMARY:Turbulent jets with off-source heating - Andy Aspden\, Lawrence Be
 rkeley National Laboratory
DTSTART:20081016T103000Z
DTEND:20081016T113000Z
UID:TALK14269@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:\nMotivated by anomalous entrainment behaviour in atmospheric 
 plumes during cloud formation\, Bhat and Narasimha (JFM 1996) pioneered an
  experimental technique to investigate the problem in the laboratory.  Hun
 t (1996) presented an analysis that suggested that a positive forcing woul
 d lead to an increase in entrainment\, whereas an increase in the relative
  turbulent intensity would lead to a decrease.  However\, Bhat and Narasim
 ha concluded that the experimental data did not support Hunt's proposal.  
 We readdress both the analysis of Hunt and the interpretation of the exper
 imental data\, and provide and alternative description of entrainment suit
 able for this particular flow.  With the aid of implicit large eddy simula
 tions (ILES)\, we investigate the new approach in the context of turbulent
  jets with off-source heating\, and provide evidence that suggests the dat
 a from the laboratory experiment are in fact consistent with the essence o
 f Hunt's proposal.\n\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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