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Prog. Theor. Phys. Vol. 84 No. 3 (1990) pp. 415-419
Enstrophy Cascade in a Model of 2D Turbulence
— Comparison with 3D Energy Cascade
—
Koji Ohkitani and
Michio Yamada*
Department of Physics, Kyoto University, Kyoto 606
*Disaster Prevention Research Institute, Kyoto University, Uji 611
(Received March 15, 1990)
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.
URL :
http://ptp.ipap.jp/link?PTP/84/415/
DOI : 10.1143/PTP.84.415
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