Berlin 2012 – wissenschaftliches Programm
DY 16.3: Vortrag
Mittwoch, 28. März 2012, 10:45–11:00, MA 144
Rotor model for the inverse cascade of two-dimensional turbulence — •Benjamin Motz and Rudolf Friedrich — Institute for Theoretical Physics, University of Münster, Wilhelm-Klemm-Str. 9, D-48149 Münster
We investigate dynamical aspects of the inverse cascade, a central phenomenon of two-dimensional turbulence. Kirchhoff’s point vortex model for fluid motion is extended by gluing together two equally-signed point vortices to one rotor. This allows to include the effects of shear, still permitting to analyze the flow in terms of a dynamical system. Our theoretical studies are supported by numerical results of the rotor model. The results are compared to direct numerical simulations of homogeneous isotropic turbulence.