Turbulence in Stratified Fluids: Kolmogorov or Bolgiano?

<strong>Seminar of the School of Physical Sciences -----------------------------------------------------------</strong> Title: <strong>Turbulence in Stratified Fluids: Kolmogorov or Bolgiano?</strong> Speaker: <strong>Jayanta K. Bhattacharjee</strong> (Harish-Chandra Research Institute, Allahabad) Date: <strong>February 4, 2015 </strong> <strong>Abstract:</strong> The most well known result of homogeneous isotropic turbulence is Kolmogorov's 5/3 law, written down from a physical picture and a dimensional argument in 1941. For turbulence in a stratified fluid Bolgiano, and independently Obukhov, proposed a 11/5 law in 1959. Over the last fifteen years a large number of numerical and experimental investigations have failed to discern any clear-cut scaling. I will discuss some recent works which I think clarifies the picture.