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SUMMARY:Energy Spectrum of buoyancy-driven turbulence - Professor Mahendra
  Verma
DTSTART:20140905T133000Z
DTEND:20140905T143000Z
UID:TALK54028@talks.cam.ac.uk
CONTACT:38636
DESCRIPTION:The inertial range properties of fluid turbulence is well desc
 ribed by Kolmogorov's theory that yields energy spectrum as k^-5/3^. The b
 uoyancy however acts as a forcing at all scales\, and it could change the 
 phenomenology dramatically. In this talk we show using direct numerical si
 mulation and arguments based onthe kinetic energy flux that the stably str
 atified flows exhibit k^-11/5^ energy spectrum. This is the first such num
 erical verification. The convective turbulence however still exhibits k^-5
 /3^ due to interesting balance between the forcing and dissipation. We als
 o demonstrate the above scaling using shell model\nof buoyancy-driven turb
 ulence.
LOCATION:MR9
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