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Enstrophy Cascade in a Model of 2D Turbulence: Comparison with 3D Energy Cascade

Koji Ohkitani, Michio Yamada

Abstract

The enstrophy cascade in a scalar model of 2D-turbulence is found to be less intermittent than the energy cascade in the 3D case. In particular, the fluctuations of the enstrophy spectral flux decrease with wavenumber in the inertial subrange. Also, the local Lyapunov exponent behaves less intermittently compared to the 3D case.

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Available abstract

Key concepts: Enstrophy, Cascade, Physics, Turbulence, Energy cascade, Wavenumber, Scalar (mathematics), Inertial frame of reference