| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
The four-fifths law for third-order longitudinal moments was examined, using direct numerical simulation data of three-dimensional (3D) magnetohydrodynamic (MHD) turbulence. The influence of the directional anisotropy on the law is suggested to be substantial, at least in the case studied here, while this is not the case for 3D hydrodynamic turbulence. A simulation method to track the time evolution of coherent vorticity and current density was also developed for 3D MHD turbulence. It isfound that the method well preserves the statistical predictability of the turbulent flow with a reduced number of degrees of freedom.
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