静止流体中で回転する円筒まわりの乱流のコリオリ力の効果

概要

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The behavior of the turbulent flow on a rotating cylinder in a quiescent fluid is dominantly influenced by the Coliorlis forces due to the system rotation. Though some studies have been performed in the stationary state, the resultant effects due to the Ciriolis force in the rotatinal frame of reference have been scarcely resherched. ln the present study the velocity and turbulent intensity are measured on the rotating system. It is shown that similarity theory support the scaling law at least as much as Barenblatt support the logarithmic law, while the experimental evidence supports the scaling law. Accrding to the Kolmogorov hypothesis, if the Reynolds number is sufficiently large, the energy spectrum shows the form E(f)〜f^<-5/3>. However, in the present flow the power-law exponent is smaller than 5/3. The probability density function has a nearly Gussian profile in the near wall region and it shows a rather positively skewed distribution in the outer layer.
長野工業高等専門学校の論文
2004-06-30