University of Cambridge > Talks.cam > DAMTP info aggregator > Energy Spectrum of buoyancy-driven turbulence

Energy Spectrum of buoyancy-driven turbulence

Add to your list(s) Download to your calendar using vCal

  • UserProfessor Mahendra Verma
  • ClockFriday 05 September 2014, 14:30-15:30
  • HouseMR9.

If you have a question about this talk, please contact pavfsec.

The inertial range properties of fluid turbulence is well described by Kolmogorov’s theory that yields energy spectrum as k-5/3. The buoyancy however acts as a forcing at all scales, and it could change the phenomenology dramatically. In this talk we show using direct numerical simulation and arguments based onthe kinetic energy flux that the stably stratified flows exhibit k-11/5 energy spectrum. This is the first such numerical verification. The convective turbulence however still exhibits k-5/3 due to interesting balance between the forcing and dissipation. We also demonstrate the above scaling using shell model of buoyancy-driven turbulence.

This talk is part of the DAMTP info aggregator series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2019 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity