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A rotating turbulent flow subjected to a β-effect has been considered in a laboratory setting. Several experiments have been performed in a rotating tank in which a shallow layer of saline solution has been forced by means of the Lorentz force. The parabolic free-surface of the rotating fluid has been used to simulate the β-effect. We investigated the emergence and the evolution of zonal jetlike structures due to the anisotropization of the upscale energy transfer typically observed in geophysical turbulence. The flow has
been characterized in terms of the zonal velocity, the degree of anisotropy, the jet scale and the energy spectra.
Author(s):
Stefania Espa
Dicea, Sapienza Università di Roma
Italy
Gabriella Di Nitto
Dicea, Sapienza Università di Roma
Italy