22.5.2013 13:30 Uhr
EXPERIMENTAL INVESTIGATION OF LARGE SCALE CIRCULATION GENERATED OVER A 2D TURBULENT FLOW

Abstract:

One of the striking features of two dimensional turbulence is the presence of large coherent structures, due to the inverse cascade of energy. When the characteristic scale of energy dissipation is larger than the size of the domain, energy accumulates in the largest scale structure which has non zero net angular momentum. This large scale circulation (LSC) breaks the symmetry of the forcing. We report the experimental study of the emergence of this LSC for an electromagnetically forced flow in a liquid metal (GalInStan).