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University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Triple cascade and zonal flows in beta-plane turbulence
Triple cascade and zonal flows in beta-plane turbulenceAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact Mustapha Amrani. The Nature of High Reynolds Number Turbulence At low amplitudes, the beta-plane model has three conservation laws: the energy, the potential enstrophy and the zonostrophy (an additional invariant found by Balk, Nazarenko and Zakharov in 1991). Application of a standard Fjortoft argument to this system leads to a conclusion that these 3 invariants must cascade in an anisotropic fashion, each cascade occupying its own sector in the 2D k-space. It appears that the energy cascade sector corresponds to generation of large-scale zonal flows in the system. I will discuss some recent numerics aimed at checking conservation of zonostrophy and the triple cascade property. This talk is part of the Isaac Newton Institute Seminar Series series. This talk is included in these lists:
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