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RädlerFest: Alpha Effect and Beyond

14–18 Feb 2011
Wenner Gren Center
Europe/Stockholm timezone

Session

Session 14

17 Feb 2011, 11:00
Wenner-Gren Center, floor 7, Hörsalen (Wenner Gren Center)

Wenner-Gren Center, floor 7, Hörsalen

Wenner Gren Center

Sveavägen 164 SE-113 46 Stockholm Sweden

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  1. 285. Tyger phenomenon for the Galerkin-truncated Burgers and Euler equations
    Prof. Uriel Frisch
    17/02/2011, 11:00
    It is shown that the solutions of inviscid hydrodynamical equations with suppression of all spatial Fourier modes having wavenumbers in excess of a threshold $\kg$ exhibit unexpected features. The study is carried out for both the one-dimensional Burgers equation and the two-dimensional incompressible Euler equation. At large $\kg$, for smooth initial conditions, the first symptom of...
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  2. 286. Local anisotropy in MHD turbulence
    Dr Chi-kwan Chan
    17/02/2011, 12:00
    Goldreich & Sridhar (1995) proposed that MHD turbulence is anisotropic. Energy cascades faster in directions that are perpendicular to the background guide field. On one hand, the (global) anisotropic spectrum is verified by numerical simulations when there are strong guide fields. On the other hand, local anisotropy is expected even the MHD turbulence is globally isotropic. We extent...
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