[
home]
[
Personal Program]
[
Help]
tag
15:30
15 mins
Normal mode decomposition in direct numerical simulations of rotating-stratified turbulence
Corentin Herbert, Raffaele Marino, Annick Pouquet, Duane Rosenberg
Session: Geophysical and astrophysical turbulence 2
Session starts: Thursday 27 August, 15:00
Presentation starts: 15:30
Room: Room C
Corentin Herbert (National Center for Atmospheric Research)
Raffaele Marino (National Center for Atmospheric Research)
Annick Pouquet (National Center for Atmospheric Research)
Duane Rosenberg (Oak Ridge National Laboratory)
Abstract:
In the presence of solid-body rotation and density stratification, turbulent flows may exhibit an inverse as well as a direct cascade. We investigate the role of turbulence and waves in these energy cascades, focusing on the inverse cascade. This is done through a normal mode decomposition of the dynamical fields in a set of direct numerical simulations in terms of inertia-gravity waves and vortical modes. In agreement with theoretical arguments, we find that the vortical modes dominate the inverse cascade of energy.