| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
The structure and stability of the steady flow in a precessing sphere and spheroid were studied by the linear stability theory, the asymptotic analysis and numerical simulation. For a sphere, the stability curve for the steady flow was determined over the whole range of the Poincare and the Reynolds numbers. The asymptotes of this curve agree excellently with the results of corresponding laboratory and numerical experiments. As for a spheroid, the structure of the steady flow was derived analytitcally in the large Reynolds number and small Poincare number limit for arbitrary values of the aspect ratio. The stability analysis of the steady flow showed the same power law as observed by laboratory experiments.
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